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1/*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/pm.h>
30#include <linux/bitops.h>
31#include <linux/debugfs.h>
32#include <linux/platform_device.h>
33#include <linux/ctype.h>
34#include <linux/slab.h>
35#include <sound/ac97_codec.h>
36#include <sound/core.h>
37#include <sound/jack.h>
38#include <sound/pcm.h>
39#include <sound/pcm_params.h>
40#include <sound/soc.h>
41#include <sound/initval.h>
42
43#define CREATE_TRACE_POINTS
44#include <trace/events/asoc.h>
45
46#define NAME_SIZE 32
47
48static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
49
50#ifdef CONFIG_DEBUG_FS
51struct dentry *snd_soc_debugfs_root;
52EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53#endif
54
55static DEFINE_MUTEX(client_mutex);
56static LIST_HEAD(card_list);
57static LIST_HEAD(dai_list);
58static LIST_HEAD(platform_list);
59static LIST_HEAD(codec_list);
60
61int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
62
63/*
64 * This is a timeout to do a DAPM powerdown after a stream is closed().
65 * It can be used to eliminate pops between different playback streams, e.g.
66 * between two audio tracks.
67 */
68static int pmdown_time = 5000;
69module_param(pmdown_time, int, 0);
70MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71
72/* returns the minimum number of bytes needed to represent
73 * a particular given value */
74static int min_bytes_needed(unsigned long val)
75{
76 int c = 0;
77 int i;
78
79 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
80 if (val & (1UL << i))
81 break;
82 c = (sizeof val * 8) - c;
83 if (!c || (c % 8))
84 c = (c + 8) / 8;
85 else
86 c /= 8;
87 return c;
88}
89
90/* fill buf which is 'len' bytes with a formatted
91 * string of the form 'reg: value\n' */
92static int format_register_str(struct snd_soc_codec *codec,
93 unsigned int reg, char *buf, size_t len)
94{
95 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
96 int regsize = codec->driver->reg_word_size * 2;
97 int ret;
98 char tmpbuf[len + 1];
99 char regbuf[regsize + 1];
100
101 /* since tmpbuf is allocated on the stack, warn the callers if they
102 * try to abuse this function */
103 WARN_ON(len > 63);
104
105 /* +2 for ': ' and + 1 for '\n' */
106 if (wordsize + regsize + 2 + 1 != len)
107 return -EINVAL;
108
109 ret = snd_soc_read(codec , reg);
110 if (ret < 0) {
111 memset(regbuf, 'X', regsize);
112 regbuf[regsize] = '\0';
113 } else {
114 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
115 }
116
117 /* prepare the buffer */
118 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
119 /* copy it back to the caller without the '\0' */
120 memcpy(buf, tmpbuf, len);
121
122 return 0;
123}
124
125/* codec register dump */
126static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
127 size_t count, loff_t pos)
128{
129 int i, step = 1;
130 int wordsize, regsize;
131 int len;
132 size_t total = 0;
133 loff_t p = 0;
134
135 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
136 regsize = codec->driver->reg_word_size * 2;
137
138 len = wordsize + regsize + 2 + 1;
139
140 if (!codec->driver->reg_cache_size)
141 return 0;
142
143 if (codec->driver->reg_cache_step)
144 step = codec->driver->reg_cache_step;
145
146 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
147 if (codec->readable_register && !codec->readable_register(codec, i))
148 continue;
149 if (codec->driver->display_register) {
150 count += codec->driver->display_register(codec, buf + count,
151 PAGE_SIZE - count, i);
152 } else {
153 /* only support larger than PAGE_SIZE bytes debugfs
154 * entries for the default case */
155 if (p >= pos) {
156 if (total + len >= count - 1)
157 break;
158 format_register_str(codec, i, buf + total, len);
159 total += len;
160 }
161 p += len;
162 }
163 }
164
165 total = min(total, count - 1);
166
167 return total;
168}
169
170static ssize_t codec_reg_show(struct device *dev,
171 struct device_attribute *attr, char *buf)
172{
173 struct snd_soc_pcm_runtime *rtd =
174 container_of(dev, struct snd_soc_pcm_runtime, dev);
175
176 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
177}
178
179static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
180
181static ssize_t pmdown_time_show(struct device *dev,
182 struct device_attribute *attr, char *buf)
183{
184 struct snd_soc_pcm_runtime *rtd =
185 container_of(dev, struct snd_soc_pcm_runtime, dev);
186
187 return sprintf(buf, "%ld\n", rtd->pmdown_time);
188}
189
190static ssize_t pmdown_time_set(struct device *dev,
191 struct device_attribute *attr,
192 const char *buf, size_t count)
193{
194 struct snd_soc_pcm_runtime *rtd =
195 container_of(dev, struct snd_soc_pcm_runtime, dev);
196 int ret;
197
198 ret = strict_strtol(buf, 10, &rtd->pmdown_time);
199 if (ret)
200 return ret;
201
202 return count;
203}
204
205static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
206
207#ifdef CONFIG_DEBUG_FS
208static int codec_reg_open_file(struct inode *inode, struct file *file)
209{
210 file->private_data = inode->i_private;
211 return 0;
212}
213
214static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
215 size_t count, loff_t *ppos)
216{
217 ssize_t ret;
218 struct snd_soc_codec *codec = file->private_data;
219 char *buf;
220
221 if (*ppos < 0 || !count)
222 return -EINVAL;
223
224 buf = kmalloc(count, GFP_KERNEL);
225 if (!buf)
226 return -ENOMEM;
227
228 ret = soc_codec_reg_show(codec, buf, count, *ppos);
229 if (ret >= 0) {
230 if (copy_to_user(user_buf, buf, ret)) {
231 kfree(buf);
232 return -EFAULT;
233 }
234 *ppos += ret;
235 }
236
237 kfree(buf);
238 return ret;
239}
240
241static ssize_t codec_reg_write_file(struct file *file,
242 const char __user *user_buf, size_t count, loff_t *ppos)
243{
244 char buf[32];
245 size_t buf_size;
246 char *start = buf;
247 unsigned long reg, value;
248 int step = 1;
249 struct snd_soc_codec *codec = file->private_data;
250
251 buf_size = min(count, (sizeof(buf)-1));
252 if (copy_from_user(buf, user_buf, buf_size))
253 return -EFAULT;
254 buf[buf_size] = 0;
255
256 if (codec->driver->reg_cache_step)
257 step = codec->driver->reg_cache_step;
258
259 while (*start == ' ')
260 start++;
261 reg = simple_strtoul(start, &start, 16);
262 while (*start == ' ')
263 start++;
264 if (strict_strtoul(start, 16, &value))
265 return -EINVAL;
266
267 /* Userspace has been fiddling around behind the kernel's back */
268 add_taint(TAINT_USER);
269
270 snd_soc_write(codec, reg, value);
271 return buf_size;
272}
273
274static const struct file_operations codec_reg_fops = {
275 .open = codec_reg_open_file,
276 .read = codec_reg_read_file,
277 .write = codec_reg_write_file,
278 .llseek = default_llseek,
279};
280
281static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
282{
283 struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
284
285 codec->debugfs_codec_root = debugfs_create_dir(codec->name,
286 debugfs_card_root);
287 if (!codec->debugfs_codec_root) {
288 printk(KERN_WARNING
289 "ASoC: Failed to create codec debugfs directory\n");
290 return;
291 }
292
293 debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
294 &codec->cache_sync);
295 debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
296 &codec->cache_only);
297
298 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
299 codec->debugfs_codec_root,
300 codec, &codec_reg_fops);
301 if (!codec->debugfs_reg)
302 printk(KERN_WARNING
303 "ASoC: Failed to create codec register debugfs file\n");
304
305 snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
306}
307
308static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
309{
310 debugfs_remove_recursive(codec->debugfs_codec_root);
311}
312
313static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
314 size_t count, loff_t *ppos)
315{
316 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
317 ssize_t len, ret = 0;
318 struct snd_soc_codec *codec;
319
320 if (!buf)
321 return -ENOMEM;
322
323 list_for_each_entry(codec, &codec_list, list) {
324 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
325 codec->name);
326 if (len >= 0)
327 ret += len;
328 if (ret > PAGE_SIZE) {
329 ret = PAGE_SIZE;
330 break;
331 }
332 }
333
334 if (ret >= 0)
335 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
336
337 kfree(buf);
338
339 return ret;
340}
341
342static const struct file_operations codec_list_fops = {
343 .read = codec_list_read_file,
344 .llseek = default_llseek,/* read accesses f_pos */
345};
346
347static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
348 size_t count, loff_t *ppos)
349{
350 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
351 ssize_t len, ret = 0;
352 struct snd_soc_dai *dai;
353
354 if (!buf)
355 return -ENOMEM;
356
357 list_for_each_entry(dai, &dai_list, list) {
358 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
359 if (len >= 0)
360 ret += len;
361 if (ret > PAGE_SIZE) {
362 ret = PAGE_SIZE;
363 break;
364 }
365 }
366
367 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
368
369 kfree(buf);
370
371 return ret;
372}
373
374static const struct file_operations dai_list_fops = {
375 .read = dai_list_read_file,
376 .llseek = default_llseek,/* read accesses f_pos */
377};
378
379static ssize_t platform_list_read_file(struct file *file,
380 char __user *user_buf,
381 size_t count, loff_t *ppos)
382{
383 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
384 ssize_t len, ret = 0;
385 struct snd_soc_platform *platform;
386
387 if (!buf)
388 return -ENOMEM;
389
390 list_for_each_entry(platform, &platform_list, list) {
391 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
392 platform->name);
393 if (len >= 0)
394 ret += len;
395 if (ret > PAGE_SIZE) {
396 ret = PAGE_SIZE;
397 break;
398 }
399 }
400
401 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
402
403 kfree(buf);
404
405 return ret;
406}
407
408static const struct file_operations platform_list_fops = {
409 .read = platform_list_read_file,
410 .llseek = default_llseek,/* read accesses f_pos */
411};
412
413static void soc_init_card_debugfs(struct snd_soc_card *card)
414{
415 card->debugfs_card_root = debugfs_create_dir(card->name,
416 snd_soc_debugfs_root);
417 if (!card->debugfs_card_root) {
418 dev_warn(card->dev,
419 "ASoC: Failed to create codec debugfs directory\n");
420 return;
421 }
422
423 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
424 card->debugfs_card_root,
425 &card->pop_time);
426 if (!card->debugfs_pop_time)
427 dev_warn(card->dev,
428 "Failed to create pop time debugfs file\n");
429}
430
431static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
432{
433 debugfs_remove_recursive(card->debugfs_card_root);
434}
435
436#else
437
438static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
439{
440}
441
442static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
443{
444}
445
446static inline void soc_init_card_debugfs(struct snd_soc_card *card)
447{
448}
449
450static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
451{
452}
453#endif
454
455#ifdef CONFIG_SND_SOC_AC97_BUS
456/* unregister ac97 codec */
457static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
458{
459 if (codec->ac97->dev.bus)
460 device_unregister(&codec->ac97->dev);
461 return 0;
462}
463
464/* stop no dev release warning */
465static void soc_ac97_device_release(struct device *dev){}
466
467/* register ac97 codec to bus */
468static int soc_ac97_dev_register(struct snd_soc_codec *codec)
469{
470 int err;
471
472 codec->ac97->dev.bus = &ac97_bus_type;
473 codec->ac97->dev.parent = codec->card->dev;
474 codec->ac97->dev.release = soc_ac97_device_release;
475
476 dev_set_name(&codec->ac97->dev, "%d-%d:%s",
477 codec->card->snd_card->number, 0, codec->name);
478 err = device_register(&codec->ac97->dev);
479 if (err < 0) {
480 snd_printk(KERN_ERR "Can't register ac97 bus\n");
481 codec->ac97->dev.bus = NULL;
482 return err;
483 }
484 return 0;
485}
486#endif
487
488#ifdef CONFIG_PM_SLEEP
489/* powers down audio subsystem for suspend */
490int snd_soc_suspend(struct device *dev)
491{
492 struct snd_soc_card *card = dev_get_drvdata(dev);
493 struct snd_soc_codec *codec;
494 int i;
495
496 /* If the initialization of this soc device failed, there is no codec
497 * associated with it. Just bail out in this case.
498 */
499 if (list_empty(&card->codec_dev_list))
500 return 0;
501
502 /* Due to the resume being scheduled into a workqueue we could
503 * suspend before that's finished - wait for it to complete.
504 */
505 snd_power_lock(card->snd_card);
506 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
507 snd_power_unlock(card->snd_card);
508
509 /* we're going to block userspace touching us until resume completes */
510 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
511
512 /* mute any active DACs */
513 for (i = 0; i < card->num_rtd; i++) {
514 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
515 struct snd_soc_dai_driver *drv = dai->driver;
516
517 if (card->rtd[i].dai_link->ignore_suspend)
518 continue;
519
520 if (drv->ops->digital_mute && dai->playback_active)
521 drv->ops->digital_mute(dai, 1);
522 }
523
524 /* suspend all pcms */
525 for (i = 0; i < card->num_rtd; i++) {
526 if (card->rtd[i].dai_link->ignore_suspend)
527 continue;
528
529 snd_pcm_suspend_all(card->rtd[i].pcm);
530 }
531
532 if (card->suspend_pre)
533 card->suspend_pre(card);
534
535 for (i = 0; i < card->num_rtd; i++) {
536 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
537 struct snd_soc_platform *platform = card->rtd[i].platform;
538
539 if (card->rtd[i].dai_link->ignore_suspend)
540 continue;
541
542 if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
543 cpu_dai->driver->suspend(cpu_dai);
544 if (platform->driver->suspend && !platform->suspended) {
545 platform->driver->suspend(cpu_dai);
546 platform->suspended = 1;
547 }
548 }
549
550 /* close any waiting streams and save state */
551 for (i = 0; i < card->num_rtd; i++) {
552 flush_delayed_work_sync(&card->rtd[i].delayed_work);
553 card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
554 }
555
556 for (i = 0; i < card->num_rtd; i++) {
557 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
558
559 if (card->rtd[i].dai_link->ignore_suspend)
560 continue;
561
562 if (driver->playback.stream_name != NULL)
563 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
564 SND_SOC_DAPM_STREAM_SUSPEND);
565
566 if (driver->capture.stream_name != NULL)
567 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
568 SND_SOC_DAPM_STREAM_SUSPEND);
569 }
570
571 /* suspend all CODECs */
572 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
573 /* If there are paths active then the CODEC will be held with
574 * bias _ON and should not be suspended. */
575 if (!codec->suspended && codec->driver->suspend) {
576 switch (codec->dapm.bias_level) {
577 case SND_SOC_BIAS_STANDBY:
578 case SND_SOC_BIAS_OFF:
579 codec->driver->suspend(codec, PMSG_SUSPEND);
580 codec->suspended = 1;
581 codec->cache_sync = 1;
582 break;
583 default:
584 dev_dbg(codec->dev, "CODEC is on over suspend\n");
585 break;
586 }
587 }
588 }
589
590 for (i = 0; i < card->num_rtd; i++) {
591 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
592
593 if (card->rtd[i].dai_link->ignore_suspend)
594 continue;
595
596 if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
597 cpu_dai->driver->suspend(cpu_dai);
598 }
599
600 if (card->suspend_post)
601 card->suspend_post(card);
602
603 return 0;
604}
605EXPORT_SYMBOL_GPL(snd_soc_suspend);
606
607/* deferred resume work, so resume can complete before we finished
608 * setting our codec back up, which can be very slow on I2C
609 */
610static void soc_resume_deferred(struct work_struct *work)
611{
612 struct snd_soc_card *card =
613 container_of(work, struct snd_soc_card, deferred_resume_work);
614 struct snd_soc_codec *codec;
615 int i;
616
617 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
618 * so userspace apps are blocked from touching us
619 */
620
621 dev_dbg(card->dev, "starting resume work\n");
622
623 /* Bring us up into D2 so that DAPM starts enabling things */
624 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
625
626 if (card->resume_pre)
627 card->resume_pre(card);
628
629 /* resume AC97 DAIs */
630 for (i = 0; i < card->num_rtd; i++) {
631 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
632
633 if (card->rtd[i].dai_link->ignore_suspend)
634 continue;
635
636 if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
637 cpu_dai->driver->resume(cpu_dai);
638 }
639
640 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
641 /* If the CODEC was idle over suspend then it will have been
642 * left with bias OFF or STANDBY and suspended so we must now
643 * resume. Otherwise the suspend was suppressed.
644 */
645 if (codec->driver->resume && codec->suspended) {
646 switch (codec->dapm.bias_level) {
647 case SND_SOC_BIAS_STANDBY:
648 case SND_SOC_BIAS_OFF:
649 codec->driver->resume(codec);
650 codec->suspended = 0;
651 break;
652 default:
653 dev_dbg(codec->dev, "CODEC was on over suspend\n");
654 break;
655 }
656 }
657 }
658
659 for (i = 0; i < card->num_rtd; i++) {
660 struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
661
662 if (card->rtd[i].dai_link->ignore_suspend)
663 continue;
664
665 if (driver->playback.stream_name != NULL)
666 snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
667 SND_SOC_DAPM_STREAM_RESUME);
668
669 if (driver->capture.stream_name != NULL)
670 snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
671 SND_SOC_DAPM_STREAM_RESUME);
672 }
673
674 /* unmute any active DACs */
675 for (i = 0; i < card->num_rtd; i++) {
676 struct snd_soc_dai *dai = card->rtd[i].codec_dai;
677 struct snd_soc_dai_driver *drv = dai->driver;
678
679 if (card->rtd[i].dai_link->ignore_suspend)
680 continue;
681
682 if (drv->ops->digital_mute && dai->playback_active)
683 drv->ops->digital_mute(dai, 0);
684 }
685
686 for (i = 0; i < card->num_rtd; i++) {
687 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
688 struct snd_soc_platform *platform = card->rtd[i].platform;
689
690 if (card->rtd[i].dai_link->ignore_suspend)
691 continue;
692
693 if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
694 cpu_dai->driver->resume(cpu_dai);
695 if (platform->driver->resume && platform->suspended) {
696 platform->driver->resume(cpu_dai);
697 platform->suspended = 0;
698 }
699 }
700
701 if (card->resume_post)
702 card->resume_post(card);
703
704 dev_dbg(card->dev, "resume work completed\n");
705
706 /* userspace can access us now we are back as we were before */
707 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
708}
709
710/* powers up audio subsystem after a suspend */
711int snd_soc_resume(struct device *dev)
712{
713 struct snd_soc_card *card = dev_get_drvdata(dev);
714 int i, ac97_control = 0;
715
716 /* AC97 devices might have other drivers hanging off them so
717 * need to resume immediately. Other drivers don't have that
718 * problem and may take a substantial amount of time to resume
719 * due to I/O costs and anti-pop so handle them out of line.
720 */
721 for (i = 0; i < card->num_rtd; i++) {
722 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
723 ac97_control |= cpu_dai->driver->ac97_control;
724 }
725 if (ac97_control) {
726 dev_dbg(dev, "Resuming AC97 immediately\n");
727 soc_resume_deferred(&card->deferred_resume_work);
728 } else {
729 dev_dbg(dev, "Scheduling resume work\n");
730 if (!schedule_work(&card->deferred_resume_work))
731 dev_err(dev, "resume work item may be lost\n");
732 }
733
734 return 0;
735}
736EXPORT_SYMBOL_GPL(snd_soc_resume);
737#else
738#define snd_soc_suspend NULL
739#define snd_soc_resume NULL
740#endif
741
742static struct snd_soc_dai_ops null_dai_ops = {
743};
744
745static int soc_bind_dai_link(struct snd_soc_card *card, int num)
746{
747 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
748 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
749 struct snd_soc_codec *codec;
750 struct snd_soc_platform *platform;
751 struct snd_soc_dai *codec_dai, *cpu_dai;
752 const char *platform_name;
753
754 if (rtd->complete)
755 return 1;
756 dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
757
758 /* do we already have the CPU DAI for this link ? */
759 if (rtd->cpu_dai) {
760 goto find_codec;
761 }
762 /* no, then find CPU DAI from registered DAIs*/
763 list_for_each_entry(cpu_dai, &dai_list, list) {
764 if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
765 rtd->cpu_dai = cpu_dai;
766 goto find_codec;
767 }
768 }
769 dev_dbg(card->dev, "CPU DAI %s not registered\n",
770 dai_link->cpu_dai_name);
771
772find_codec:
773 /* do we already have the CODEC for this link ? */
774 if (rtd->codec) {
775 goto find_platform;
776 }
777
778 /* no, then find CODEC from registered CODECs*/
779 list_for_each_entry(codec, &codec_list, list) {
780 if (!strcmp(codec->name, dai_link->codec_name)) {
781 rtd->codec = codec;
782
783 /* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
784 list_for_each_entry(codec_dai, &dai_list, list) {
785 if (codec->dev == codec_dai->dev &&
786 !strcmp(codec_dai->name, dai_link->codec_dai_name)) {
787 rtd->codec_dai = codec_dai;
788 goto find_platform;
789 }
790 }
791 dev_dbg(card->dev, "CODEC DAI %s not registered\n",
792 dai_link->codec_dai_name);
793
794 goto find_platform;
795 }
796 }
797 dev_dbg(card->dev, "CODEC %s not registered\n",
798 dai_link->codec_name);
799
800find_platform:
801 /* do we need a platform? */
802 if (rtd->platform)
803 goto out;
804
805 /* if there's no platform we match on the empty platform */
806 platform_name = dai_link->platform_name;
807 if (!platform_name)
808 platform_name = "snd-soc-dummy";
809
810 /* no, then find one from the set of registered platforms */
811 list_for_each_entry(platform, &platform_list, list) {
812 if (!strcmp(platform->name, platform_name)) {
813 rtd->platform = platform;
814 goto out;
815 }
816 }
817
818 dev_dbg(card->dev, "platform %s not registered\n",
819 dai_link->platform_name);
820 return 0;
821
822out:
823 /* mark rtd as complete if we found all 4 of our client devices */
824 if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
825 rtd->complete = 1;
826 card->num_rtd++;
827 }
828 return 1;
829}
830
831static void soc_remove_codec(struct snd_soc_codec *codec)
832{
833 int err;
834
835 if (codec->driver->remove) {
836 err = codec->driver->remove(codec);
837 if (err < 0)
838 dev_err(codec->dev,
839 "asoc: failed to remove %s: %d\n",
840 codec->name, err);
841 }
842
843 /* Make sure all DAPM widgets are freed */
844 snd_soc_dapm_free(&codec->dapm);
845
846 soc_cleanup_codec_debugfs(codec);
847 codec->probed = 0;
848 list_del(&codec->card_list);
849 module_put(codec->dev->driver->owner);
850}
851
852static void soc_remove_dai_link(struct snd_soc_card *card, int num, int order)
853{
854 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
855 struct snd_soc_codec *codec = rtd->codec;
856 struct snd_soc_platform *platform = rtd->platform;
857 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
858 int err;
859
860 /* unregister the rtd device */
861 if (rtd->dev_registered) {
862 device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
863 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
864 device_unregister(&rtd->dev);
865 rtd->dev_registered = 0;
866 }
867
868 /* remove the CODEC DAI */
869 if (codec_dai && codec_dai->probed &&
870 codec_dai->driver->remove_order == order) {
871 if (codec_dai->driver->remove) {
872 err = codec_dai->driver->remove(codec_dai);
873 if (err < 0)
874 printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
875 }
876 codec_dai->probed = 0;
877 list_del(&codec_dai->card_list);
878 }
879
880 /* remove the platform */
881 if (platform && platform->probed &&
882 platform->driver->remove_order == order) {
883 if (platform->driver->remove) {
884 err = platform->driver->remove(platform);
885 if (err < 0)
886 printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
887 }
888 platform->probed = 0;
889 list_del(&platform->card_list);
890 module_put(platform->dev->driver->owner);
891 }
892
893 /* remove the CODEC */
894 if (codec && codec->probed &&
895 codec->driver->remove_order == order)
896 soc_remove_codec(codec);
897
898 /* remove the cpu_dai */
899 if (cpu_dai && cpu_dai->probed &&
900 cpu_dai->driver->remove_order == order) {
901 if (cpu_dai->driver->remove) {
902 err = cpu_dai->driver->remove(cpu_dai);
903 if (err < 0)
904 printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
905 }
906 cpu_dai->probed = 0;
907 list_del(&cpu_dai->card_list);
908 module_put(cpu_dai->dev->driver->owner);
909 }
910}
911
912static void soc_remove_dai_links(struct snd_soc_card *card)
913{
914 int dai, order;
915
916 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
917 order++) {
918 for (dai = 0; dai < card->num_rtd; dai++)
919 soc_remove_dai_link(card, dai, order);
920 }
921 card->num_rtd = 0;
922}
923
924static void soc_set_name_prefix(struct snd_soc_card *card,
925 struct snd_soc_codec *codec)
926{
927 int i;
928
929 if (card->codec_conf == NULL)
930 return;
931
932 for (i = 0; i < card->num_configs; i++) {
933 struct snd_soc_codec_conf *map = &card->codec_conf[i];
934 if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
935 codec->name_prefix = map->name_prefix;
936 break;
937 }
938 }
939}
940
941static int soc_probe_codec(struct snd_soc_card *card,
942 struct snd_soc_codec *codec)
943{
944 int ret = 0;
945 const struct snd_soc_codec_driver *driver = codec->driver;
946
947 codec->card = card;
948 codec->dapm.card = card;
949 soc_set_name_prefix(card, codec);
950
951 if (!try_module_get(codec->dev->driver->owner))
952 return -ENODEV;
953
954 soc_init_codec_debugfs(codec);
955
956 if (driver->dapm_widgets)
957 snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
958 driver->num_dapm_widgets);
959
960 if (driver->probe) {
961 ret = driver->probe(codec);
962 if (ret < 0) {
963 dev_err(codec->dev,
964 "asoc: failed to probe CODEC %s: %d\n",
965 codec->name, ret);
966 goto err_probe;
967 }
968 }
969
970 if (driver->controls)
971 snd_soc_add_controls(codec, driver->controls,
972 driver->num_controls);
973 if (driver->dapm_routes)
974 snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
975 driver->num_dapm_routes);
976
977 /* mark codec as probed and add to card codec list */
978 codec->probed = 1;
979 list_add(&codec->card_list, &card->codec_dev_list);
980 list_add(&codec->dapm.list, &card->dapm_list);
981
982 return 0;
983
984err_probe:
985 soc_cleanup_codec_debugfs(codec);
986 module_put(codec->dev->driver->owner);
987
988 return ret;
989}
990
991static int soc_probe_platform(struct snd_soc_card *card,
992 struct snd_soc_platform *platform)
993{
994 int ret = 0;
995 const struct snd_soc_platform_driver *driver = platform->driver;
996
997 platform->card = card;
998 platform->dapm.card = card;
999
1000 if (!try_module_get(platform->dev->driver->owner))
1001 return -ENODEV;
1002
1003 if (driver->dapm_widgets)
1004 snd_soc_dapm_new_controls(&platform->dapm,
1005 driver->dapm_widgets, driver->num_dapm_widgets);
1006
1007 if (driver->probe) {
1008 ret = driver->probe(platform);
1009 if (ret < 0) {
1010 dev_err(platform->dev,
1011 "asoc: failed to probe platform %s: %d\n",
1012 platform->name, ret);
1013 goto err_probe;
1014 }
1015 }
1016
1017 if (driver->controls)
1018 snd_soc_add_platform_controls(platform, driver->controls,
1019 driver->num_controls);
1020 if (driver->dapm_routes)
1021 snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1022 driver->num_dapm_routes);
1023
1024 /* mark platform as probed and add to card platform list */
1025 platform->probed = 1;
1026 list_add(&platform->card_list, &card->platform_dev_list);
1027 list_add(&platform->dapm.list, &card->dapm_list);
1028
1029 return 0;
1030
1031err_probe:
1032 module_put(platform->dev->driver->owner);
1033
1034 return ret;
1035}
1036
1037static void rtd_release(struct device *dev) {}
1038
1039static int soc_post_component_init(struct snd_soc_card *card,
1040 struct snd_soc_codec *codec,
1041 int num, int dailess)
1042{
1043 struct snd_soc_dai_link *dai_link = NULL;
1044 struct snd_soc_aux_dev *aux_dev = NULL;
1045 struct snd_soc_pcm_runtime *rtd;
1046 const char *temp, *name;
1047 int ret = 0;
1048
1049 if (!dailess) {
1050 dai_link = &card->dai_link[num];
1051 rtd = &card->rtd[num];
1052 name = dai_link->name;
1053 } else {
1054 aux_dev = &card->aux_dev[num];
1055 rtd = &card->rtd_aux[num];
1056 name = aux_dev->name;
1057 }
1058 rtd->card = card;
1059
1060 /* machine controls, routes and widgets are not prefixed */
1061 temp = codec->name_prefix;
1062 codec->name_prefix = NULL;
1063
1064 /* do machine specific initialization */
1065 if (!dailess && dai_link->init)
1066 ret = dai_link->init(rtd);
1067 else if (dailess && aux_dev->init)
1068 ret = aux_dev->init(&codec->dapm);
1069 if (ret < 0) {
1070 dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1071 return ret;
1072 }
1073 codec->name_prefix = temp;
1074
1075 /* Make sure all DAPM widgets are instantiated */
1076 snd_soc_dapm_new_widgets(&codec->dapm);
1077
1078 /* register the rtd device */
1079 rtd->codec = codec;
1080 rtd->dev.parent = card->dev;
1081 rtd->dev.release = rtd_release;
1082 rtd->dev.init_name = name;
1083 mutex_init(&rtd->pcm_mutex);
1084 ret = device_register(&rtd->dev);
1085 if (ret < 0) {
1086 dev_err(card->dev,
1087 "asoc: failed to register runtime device: %d\n", ret);
1088 return ret;
1089 }
1090 rtd->dev_registered = 1;
1091
1092 /* add DAPM sysfs entries for this codec */
1093 ret = snd_soc_dapm_sys_add(&rtd->dev);
1094 if (ret < 0)
1095 dev_err(codec->dev,
1096 "asoc: failed to add codec dapm sysfs entries: %d\n",
1097 ret);
1098
1099 /* add codec sysfs entries */
1100 ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
1101 if (ret < 0)
1102 dev_err(codec->dev,
1103 "asoc: failed to add codec sysfs files: %d\n", ret);
1104
1105 return 0;
1106}
1107
1108static int soc_probe_dai_link(struct snd_soc_card *card, int num, int order)
1109{
1110 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1111 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1112 struct snd_soc_codec *codec = rtd->codec;
1113 struct snd_soc_platform *platform = rtd->platform;
1114 struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
1115 int ret;
1116
1117 dev_dbg(card->dev, "probe %s dai link %d late %d\n",
1118 card->name, num, order);
1119
1120 /* config components */
1121 codec_dai->codec = codec;
1122 cpu_dai->platform = platform;
1123 codec_dai->card = card;
1124 cpu_dai->card = card;
1125
1126 /* set default power off timeout */
1127 rtd->pmdown_time = pmdown_time;
1128
1129 /* probe the cpu_dai */
1130 if (!cpu_dai->probed &&
1131 cpu_dai->driver->probe_order == order) {
1132 if (!try_module_get(cpu_dai->dev->driver->owner))
1133 return -ENODEV;
1134
1135 if (cpu_dai->driver->probe) {
1136 ret = cpu_dai->driver->probe(cpu_dai);
1137 if (ret < 0) {
1138 printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
1139 cpu_dai->name);
1140 module_put(cpu_dai->dev->driver->owner);
1141 return ret;
1142 }
1143 }
1144 cpu_dai->probed = 1;
1145 /* mark cpu_dai as probed and add to card dai list */
1146 list_add(&cpu_dai->card_list, &card->dai_dev_list);
1147 }
1148
1149 /* probe the CODEC */
1150 if (!codec->probed &&
1151 codec->driver->probe_order == order) {
1152 ret = soc_probe_codec(card, codec);
1153 if (ret < 0)
1154 return ret;
1155 }
1156
1157 /* probe the platform */
1158 if (!platform->probed &&
1159 platform->driver->probe_order == order) {
1160 ret = soc_probe_platform(card, platform);
1161 if (ret < 0)
1162 return ret;
1163 }
1164
1165 /* probe the CODEC DAI */
1166 if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1167 if (codec_dai->driver->probe) {
1168 ret = codec_dai->driver->probe(codec_dai);
1169 if (ret < 0) {
1170 printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
1171 codec_dai->name);
1172 return ret;
1173 }
1174 }
1175
1176 /* mark codec_dai as probed and add to card dai list */
1177 codec_dai->probed = 1;
1178 list_add(&codec_dai->card_list, &card->dai_dev_list);
1179 }
1180
1181 /* complete DAI probe during last probe */
1182 if (order != SND_SOC_COMP_ORDER_LAST)
1183 return 0;
1184
1185 ret = soc_post_component_init(card, codec, num, 0);
1186 if (ret)
1187 return ret;
1188
1189 ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
1190 if (ret < 0)
1191 printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
1192
1193 /* create the pcm */
1194 ret = soc_new_pcm(rtd, num);
1195 if (ret < 0) {
1196 printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
1197 return ret;
1198 }
1199
1200 /* add platform data for AC97 devices */
1201 if (rtd->codec_dai->driver->ac97_control)
1202 snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1203
1204 return 0;
1205}
1206
1207#ifdef CONFIG_SND_SOC_AC97_BUS
1208static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1209{
1210 int ret;
1211
1212 /* Only instantiate AC97 if not already done by the adaptor
1213 * for the generic AC97 subsystem.
1214 */
1215 if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1216 /*
1217 * It is possible that the AC97 device is already registered to
1218 * the device subsystem. This happens when the device is created
1219 * via snd_ac97_mixer(). Currently only SoC codec that does so
1220 * is the generic AC97 glue but others migh emerge.
1221 *
1222 * In those cases we don't try to register the device again.
1223 */
1224 if (!rtd->codec->ac97_created)
1225 return 0;
1226
1227 ret = soc_ac97_dev_register(rtd->codec);
1228 if (ret < 0) {
1229 printk(KERN_ERR "asoc: AC97 device register failed\n");
1230 return ret;
1231 }
1232
1233 rtd->codec->ac97_registered = 1;
1234 }
1235 return 0;
1236}
1237
1238static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1239{
1240 if (codec->ac97_registered) {
1241 soc_ac97_dev_unregister(codec);
1242 codec->ac97_registered = 0;
1243 }
1244}
1245#endif
1246
1247static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1248{
1249 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1250 struct snd_soc_codec *codec;
1251 int ret = -ENODEV;
1252
1253 /* find CODEC from registered CODECs*/
1254 list_for_each_entry(codec, &codec_list, list) {
1255 if (!strcmp(codec->name, aux_dev->codec_name)) {
1256 if (codec->probed) {
1257 dev_err(codec->dev,
1258 "asoc: codec already probed");
1259 ret = -EBUSY;
1260 goto out;
1261 }
1262 goto found;
1263 }
1264 }
1265 /* codec not found */
1266 dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1267 goto out;
1268
1269found:
1270 ret = soc_probe_codec(card, codec);
1271 if (ret < 0)
1272 return ret;
1273
1274 ret = soc_post_component_init(card, codec, num, 1);
1275
1276out:
1277 return ret;
1278}
1279
1280static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1281{
1282 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1283 struct snd_soc_codec *codec = rtd->codec;
1284
1285 /* unregister the rtd device */
1286 if (rtd->dev_registered) {
1287 device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1288 device_unregister(&rtd->dev);
1289 rtd->dev_registered = 0;
1290 }
1291
1292 if (codec && codec->probed)
1293 soc_remove_codec(codec);
1294}
1295
1296static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1297 enum snd_soc_compress_type compress_type)
1298{
1299 int ret;
1300
1301 if (codec->cache_init)
1302 return 0;
1303
1304 /* override the compress_type if necessary */
1305 if (compress_type && codec->compress_type != compress_type)
1306 codec->compress_type = compress_type;
1307 ret = snd_soc_cache_init(codec);
1308 if (ret < 0) {
1309 dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1310 ret);
1311 return ret;
1312 }
1313 codec->cache_init = 1;
1314 return 0;
1315}
1316
1317static void snd_soc_instantiate_card(struct snd_soc_card *card)
1318{
1319 struct snd_soc_codec *codec;
1320 struct snd_soc_codec_conf *codec_conf;
1321 enum snd_soc_compress_type compress_type;
1322 int ret, i, order;
1323
1324 mutex_lock(&card->mutex);
1325
1326 if (card->instantiated) {
1327 mutex_unlock(&card->mutex);
1328 return;
1329 }
1330
1331 /* bind DAIs */
1332 for (i = 0; i < card->num_links; i++)
1333 soc_bind_dai_link(card, i);
1334
1335 /* bind completed ? */
1336 if (card->num_rtd != card->num_links) {
1337 mutex_unlock(&card->mutex);
1338 return;
1339 }
1340
1341 /* initialize the register cache for each available codec */
1342 list_for_each_entry(codec, &codec_list, list) {
1343 if (codec->cache_init)
1344 continue;
1345 /* by default we don't override the compress_type */
1346 compress_type = 0;
1347 /* check to see if we need to override the compress_type */
1348 for (i = 0; i < card->num_configs; ++i) {
1349 codec_conf = &card->codec_conf[i];
1350 if (!strcmp(codec->name, codec_conf->dev_name)) {
1351 compress_type = codec_conf->compress_type;
1352 if (compress_type && compress_type
1353 != codec->compress_type)
1354 break;
1355 }
1356 }
1357 ret = snd_soc_init_codec_cache(codec, compress_type);
1358 if (ret < 0) {
1359 mutex_unlock(&card->mutex);
1360 return;
1361 }
1362 }
1363
1364 /* card bind complete so register a sound card */
1365 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1366 card->owner, 0, &card->snd_card);
1367 if (ret < 0) {
1368 printk(KERN_ERR "asoc: can't create sound card for card %s\n",
1369 card->name);
1370 mutex_unlock(&card->mutex);
1371 return;
1372 }
1373 card->snd_card->dev = card->dev;
1374
1375 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1376 card->dapm.dev = card->dev;
1377 card->dapm.card = card;
1378 list_add(&card->dapm.list, &card->dapm_list);
1379
1380#ifdef CONFIG_DEBUG_FS
1381 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1382#endif
1383
1384#ifdef CONFIG_PM_SLEEP
1385 /* deferred resume work */
1386 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1387#endif
1388
1389 if (card->dapm_widgets)
1390 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1391 card->num_dapm_widgets);
1392
1393 /* initialise the sound card only once */
1394 if (card->probe) {
1395 ret = card->probe(card);
1396 if (ret < 0)
1397 goto card_probe_error;
1398 }
1399
1400 /* early DAI link probe */
1401 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1402 order++) {
1403 for (i = 0; i < card->num_links; i++) {
1404 ret = soc_probe_dai_link(card, i, order);
1405 if (ret < 0) {
1406 pr_err("asoc: failed to instantiate card %s: %d\n",
1407 card->name, ret);
1408 goto probe_dai_err;
1409 }
1410 }
1411 }
1412
1413 for (i = 0; i < card->num_aux_devs; i++) {
1414 ret = soc_probe_aux_dev(card, i);
1415 if (ret < 0) {
1416 pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1417 card->name, ret);
1418 goto probe_aux_dev_err;
1419 }
1420 }
1421
1422 /* We should have a non-codec control add function but we don't */
1423 if (card->controls)
1424 snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
1425 struct snd_soc_codec,
1426 card_list),
1427 card->controls,
1428 card->num_controls);
1429
1430 if (card->dapm_routes)
1431 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1432 card->num_dapm_routes);
1433
1434 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1435 "%s", card->name);
1436 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1437 "%s", card->long_name ? card->long_name : card->name);
1438 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1439 "%s", card->driver_name ? card->driver_name : card->name);
1440 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1441 switch (card->snd_card->driver[i]) {
1442 case '_':
1443 case '-':
1444 case '\0':
1445 break;
1446 default:
1447 if (!isalnum(card->snd_card->driver[i]))
1448 card->snd_card->driver[i] = '_';
1449 break;
1450 }
1451 }
1452
1453 if (card->late_probe) {
1454 ret = card->late_probe(card);
1455 if (ret < 0) {
1456 dev_err(card->dev, "%s late_probe() failed: %d\n",
1457 card->name, ret);
1458 goto probe_aux_dev_err;
1459 }
1460 }
1461
1462 ret = snd_card_register(card->snd_card);
1463 if (ret < 0) {
1464 printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1465 goto probe_aux_dev_err;
1466 }
1467
1468#ifdef CONFIG_SND_SOC_AC97_BUS
1469 /* register any AC97 codecs */
1470 for (i = 0; i < card->num_rtd; i++) {
1471 ret = soc_register_ac97_dai_link(&card->rtd[i]);
1472 if (ret < 0) {
1473 printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
1474 while (--i >= 0)
1475 soc_unregister_ac97_dai_link(card->rtd[i].codec);
1476 goto probe_aux_dev_err;
1477 }
1478 }
1479#endif
1480
1481 card->instantiated = 1;
1482 mutex_unlock(&card->mutex);
1483 return;
1484
1485probe_aux_dev_err:
1486 for (i = 0; i < card->num_aux_devs; i++)
1487 soc_remove_aux_dev(card, i);
1488
1489probe_dai_err:
1490 soc_remove_dai_links(card);
1491
1492card_probe_error:
1493 if (card->remove)
1494 card->remove(card);
1495
1496 snd_card_free(card->snd_card);
1497
1498 mutex_unlock(&card->mutex);
1499}
1500
1501/*
1502 * Attempt to initialise any uninitialised cards. Must be called with
1503 * client_mutex.
1504 */
1505static void snd_soc_instantiate_cards(void)
1506{
1507 struct snd_soc_card *card;
1508 list_for_each_entry(card, &card_list, list)
1509 snd_soc_instantiate_card(card);
1510}
1511
1512/* probes a new socdev */
1513static int soc_probe(struct platform_device *pdev)
1514{
1515 struct snd_soc_card *card = platform_get_drvdata(pdev);
1516 int ret = 0;
1517
1518 /*
1519 * no card, so machine driver should be registering card
1520 * we should not be here in that case so ret error
1521 */
1522 if (!card)
1523 return -EINVAL;
1524
1525 /* Bodge while we unpick instantiation */
1526 card->dev = &pdev->dev;
1527
1528 ret = snd_soc_register_card(card);
1529 if (ret != 0) {
1530 dev_err(&pdev->dev, "Failed to register card\n");
1531 return ret;
1532 }
1533
1534 return 0;
1535}
1536
1537static int soc_cleanup_card_resources(struct snd_soc_card *card)
1538{
1539 int i;
1540
1541 /* make sure any delayed work runs */
1542 for (i = 0; i < card->num_rtd; i++) {
1543 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1544 flush_delayed_work_sync(&rtd->delayed_work);
1545 }
1546
1547 /* remove auxiliary devices */
1548 for (i = 0; i < card->num_aux_devs; i++)
1549 soc_remove_aux_dev(card, i);
1550
1551 /* remove and free each DAI */
1552 soc_remove_dai_links(card);
1553
1554 soc_cleanup_card_debugfs(card);
1555
1556 /* remove the card */
1557 if (card->remove)
1558 card->remove(card);
1559
1560 snd_soc_dapm_free(&card->dapm);
1561
1562 kfree(card->rtd);
1563 snd_card_free(card->snd_card);
1564 return 0;
1565
1566}
1567
1568/* removes a socdev */
1569static int soc_remove(struct platform_device *pdev)
1570{
1571 struct snd_soc_card *card = platform_get_drvdata(pdev);
1572
1573 snd_soc_unregister_card(card);
1574 return 0;
1575}
1576
1577int snd_soc_poweroff(struct device *dev)
1578{
1579 struct snd_soc_card *card = dev_get_drvdata(dev);
1580 int i;
1581
1582 if (!card->instantiated)
1583 return 0;
1584
1585 /* Flush out pmdown_time work - we actually do want to run it
1586 * now, we're shutting down so no imminent restart. */
1587 for (i = 0; i < card->num_rtd; i++) {
1588 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1589 flush_delayed_work_sync(&rtd->delayed_work);
1590 }
1591
1592 snd_soc_dapm_shutdown(card);
1593
1594 return 0;
1595}
1596EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1597
1598const struct dev_pm_ops snd_soc_pm_ops = {
1599 .suspend = snd_soc_suspend,
1600 .resume = snd_soc_resume,
1601 .poweroff = snd_soc_poweroff,
1602};
1603EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1604
1605/* ASoC platform driver */
1606static struct platform_driver soc_driver = {
1607 .driver = {
1608 .name = "soc-audio",
1609 .owner = THIS_MODULE,
1610 .pm = &snd_soc_pm_ops,
1611 },
1612 .probe = soc_probe,
1613 .remove = soc_remove,
1614};
1615
1616/**
1617 * snd_soc_codec_volatile_register: Report if a register is volatile.
1618 *
1619 * @codec: CODEC to query.
1620 * @reg: Register to query.
1621 *
1622 * Boolean function indiciating if a CODEC register is volatile.
1623 */
1624int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1625 unsigned int reg)
1626{
1627 if (codec->volatile_register)
1628 return codec->volatile_register(codec, reg);
1629 else
1630 return 0;
1631}
1632EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1633
1634/**
1635 * snd_soc_codec_readable_register: Report if a register is readable.
1636 *
1637 * @codec: CODEC to query.
1638 * @reg: Register to query.
1639 *
1640 * Boolean function indicating if a CODEC register is readable.
1641 */
1642int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1643 unsigned int reg)
1644{
1645 if (codec->readable_register)
1646 return codec->readable_register(codec, reg);
1647 else
1648 return 1;
1649}
1650EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1651
1652/**
1653 * snd_soc_codec_writable_register: Report if a register is writable.
1654 *
1655 * @codec: CODEC to query.
1656 * @reg: Register to query.
1657 *
1658 * Boolean function indicating if a CODEC register is writable.
1659 */
1660int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
1661 unsigned int reg)
1662{
1663 if (codec->writable_register)
1664 return codec->writable_register(codec, reg);
1665 else
1666 return 1;
1667}
1668EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
1669
1670int snd_soc_platform_read(struct snd_soc_platform *platform,
1671 unsigned int reg)
1672{
1673 unsigned int ret;
1674
1675 if (!platform->driver->read) {
1676 dev_err(platform->dev, "platform has no read back\n");
1677 return -1;
1678 }
1679
1680 ret = platform->driver->read(platform, reg);
1681 dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
1682 trace_snd_soc_preg_read(platform, reg, ret);
1683
1684 return ret;
1685}
1686EXPORT_SYMBOL_GPL(snd_soc_platform_read);
1687
1688int snd_soc_platform_write(struct snd_soc_platform *platform,
1689 unsigned int reg, unsigned int val)
1690{
1691 if (!platform->driver->write) {
1692 dev_err(platform->dev, "platform has no write back\n");
1693 return -1;
1694 }
1695
1696 dev_dbg(platform->dev, "write %x = %x\n", reg, val);
1697 trace_snd_soc_preg_write(platform, reg, val);
1698 return platform->driver->write(platform, reg, val);
1699}
1700EXPORT_SYMBOL_GPL(snd_soc_platform_write);
1701
1702/**
1703 * snd_soc_new_ac97_codec - initailise AC97 device
1704 * @codec: audio codec
1705 * @ops: AC97 bus operations
1706 * @num: AC97 codec number
1707 *
1708 * Initialises AC97 codec resources for use by ad-hoc devices only.
1709 */
1710int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
1711 struct snd_ac97_bus_ops *ops, int num)
1712{
1713 mutex_lock(&codec->mutex);
1714
1715 codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
1716 if (codec->ac97 == NULL) {
1717 mutex_unlock(&codec->mutex);
1718 return -ENOMEM;
1719 }
1720
1721 codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
1722 if (codec->ac97->bus == NULL) {
1723 kfree(codec->ac97);
1724 codec->ac97 = NULL;
1725 mutex_unlock(&codec->mutex);
1726 return -ENOMEM;
1727 }
1728
1729 codec->ac97->bus->ops = ops;
1730 codec->ac97->num = num;
1731
1732 /*
1733 * Mark the AC97 device to be created by us. This way we ensure that the
1734 * device will be registered with the device subsystem later on.
1735 */
1736 codec->ac97_created = 1;
1737
1738 mutex_unlock(&codec->mutex);
1739 return 0;
1740}
1741EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
1742
1743/**
1744 * snd_soc_free_ac97_codec - free AC97 codec device
1745 * @codec: audio codec
1746 *
1747 * Frees AC97 codec device resources.
1748 */
1749void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
1750{
1751 mutex_lock(&codec->mutex);
1752#ifdef CONFIG_SND_SOC_AC97_BUS
1753 soc_unregister_ac97_dai_link(codec);
1754#endif
1755 kfree(codec->ac97->bus);
1756 kfree(codec->ac97);
1757 codec->ac97 = NULL;
1758 codec->ac97_created = 0;
1759 mutex_unlock(&codec->mutex);
1760}
1761EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
1762
1763unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
1764{
1765 unsigned int ret;
1766
1767 ret = codec->read(codec, reg);
1768 dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
1769 trace_snd_soc_reg_read(codec, reg, ret);
1770
1771 return ret;
1772}
1773EXPORT_SYMBOL_GPL(snd_soc_read);
1774
1775unsigned int snd_soc_write(struct snd_soc_codec *codec,
1776 unsigned int reg, unsigned int val)
1777{
1778 dev_dbg(codec->dev, "write %x = %x\n", reg, val);
1779 trace_snd_soc_reg_write(codec, reg, val);
1780 return codec->write(codec, reg, val);
1781}
1782EXPORT_SYMBOL_GPL(snd_soc_write);
1783
1784unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
1785 unsigned int reg, const void *data, size_t len)
1786{
1787 return codec->bulk_write_raw(codec, reg, data, len);
1788}
1789EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
1790
1791/**
1792 * snd_soc_update_bits - update codec register bits
1793 * @codec: audio codec
1794 * @reg: codec register
1795 * @mask: register mask
1796 * @value: new value
1797 *
1798 * Writes new register value.
1799 *
1800 * Returns 1 for change, 0 for no change, or negative error code.
1801 */
1802int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1803 unsigned int mask, unsigned int value)
1804{
1805 int change;
1806 unsigned int old, new;
1807 int ret;
1808
1809 ret = snd_soc_read(codec, reg);
1810 if (ret < 0)
1811 return ret;
1812
1813 old = ret;
1814 new = (old & ~mask) | (value & mask);
1815 change = old != new;
1816 if (change) {
1817 ret = snd_soc_write(codec, reg, new);
1818 if (ret < 0)
1819 return ret;
1820 }
1821
1822 return change;
1823}
1824EXPORT_SYMBOL_GPL(snd_soc_update_bits);
1825
1826/**
1827 * snd_soc_update_bits_locked - update codec register bits
1828 * @codec: audio codec
1829 * @reg: codec register
1830 * @mask: register mask
1831 * @value: new value
1832 *
1833 * Writes new register value, and takes the codec mutex.
1834 *
1835 * Returns 1 for change else 0.
1836 */
1837int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
1838 unsigned short reg, unsigned int mask,
1839 unsigned int value)
1840{
1841 int change;
1842
1843 mutex_lock(&codec->mutex);
1844 change = snd_soc_update_bits(codec, reg, mask, value);
1845 mutex_unlock(&codec->mutex);
1846
1847 return change;
1848}
1849EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1850
1851/**
1852 * snd_soc_test_bits - test register for change
1853 * @codec: audio codec
1854 * @reg: codec register
1855 * @mask: register mask
1856 * @value: new value
1857 *
1858 * Tests a register with a new value and checks if the new value is
1859 * different from the old value.
1860 *
1861 * Returns 1 for change else 0.
1862 */
1863int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1864 unsigned int mask, unsigned int value)
1865{
1866 int change;
1867 unsigned int old, new;
1868
1869 old = snd_soc_read(codec, reg);
1870 new = (old & ~mask) | value;
1871 change = old != new;
1872
1873 return change;
1874}
1875EXPORT_SYMBOL_GPL(snd_soc_test_bits);
1876
1877/**
1878 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
1879 * @substream: the pcm substream
1880 * @hw: the hardware parameters
1881 *
1882 * Sets the substream runtime hardware parameters.
1883 */
1884int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
1885 const struct snd_pcm_hardware *hw)
1886{
1887 struct snd_pcm_runtime *runtime = substream->runtime;
1888 runtime->hw.info = hw->info;
1889 runtime->hw.formats = hw->formats;
1890 runtime->hw.period_bytes_min = hw->period_bytes_min;
1891 runtime->hw.period_bytes_max = hw->period_bytes_max;
1892 runtime->hw.periods_min = hw->periods_min;
1893 runtime->hw.periods_max = hw->periods_max;
1894 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
1895 runtime->hw.fifo_size = hw->fifo_size;
1896 return 0;
1897}
1898EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
1899
1900/**
1901 * snd_soc_cnew - create new control
1902 * @_template: control template
1903 * @data: control private data
1904 * @long_name: control long name
1905 * @prefix: control name prefix
1906 *
1907 * Create a new mixer control from a template control.
1908 *
1909 * Returns 0 for success, else error.
1910 */
1911struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1912 void *data, char *long_name,
1913 const char *prefix)
1914{
1915 struct snd_kcontrol_new template;
1916 struct snd_kcontrol *kcontrol;
1917 char *name = NULL;
1918 int name_len;
1919
1920 memcpy(&template, _template, sizeof(template));
1921 template.index = 0;
1922
1923 if (!long_name)
1924 long_name = template.name;
1925
1926 if (prefix) {
1927 name_len = strlen(long_name) + strlen(prefix) + 2;
1928 name = kmalloc(name_len, GFP_KERNEL);
1929 if (!name)
1930 return NULL;
1931
1932 snprintf(name, name_len, "%s %s", prefix, long_name);
1933
1934 template.name = name;
1935 } else {
1936 template.name = long_name;
1937 }
1938
1939 kcontrol = snd_ctl_new1(&template, data);
1940
1941 kfree(name);
1942
1943 return kcontrol;
1944}
1945EXPORT_SYMBOL_GPL(snd_soc_cnew);
1946
1947/**
1948 * snd_soc_add_controls - add an array of controls to a codec.
1949 * Convienience function to add a list of controls. Many codecs were
1950 * duplicating this code.
1951 *
1952 * @codec: codec to add controls to
1953 * @controls: array of controls to add
1954 * @num_controls: number of elements in the array
1955 *
1956 * Return 0 for success, else error.
1957 */
1958int snd_soc_add_controls(struct snd_soc_codec *codec,
1959 const struct snd_kcontrol_new *controls, int num_controls)
1960{
1961 struct snd_card *card = codec->card->snd_card;
1962 int err, i;
1963
1964 for (i = 0; i < num_controls; i++) {
1965 const struct snd_kcontrol_new *control = &controls[i];
1966 err = snd_ctl_add(card, snd_soc_cnew(control, codec,
1967 control->name,
1968 codec->name_prefix));
1969 if (err < 0) {
1970 dev_err(codec->dev, "%s: Failed to add %s: %d\n",
1971 codec->name, control->name, err);
1972 return err;
1973 }
1974 }
1975
1976 return 0;
1977}
1978EXPORT_SYMBOL_GPL(snd_soc_add_controls);
1979
1980/**
1981 * snd_soc_add_platform_controls - add an array of controls to a platform.
1982 * Convienience function to add a list of controls.
1983 *
1984 * @platform: platform to add controls to
1985 * @controls: array of controls to add
1986 * @num_controls: number of elements in the array
1987 *
1988 * Return 0 for success, else error.
1989 */
1990int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1991 const struct snd_kcontrol_new *controls, int num_controls)
1992{
1993 struct snd_card *card = platform->card->snd_card;
1994 int err, i;
1995
1996 for (i = 0; i < num_controls; i++) {
1997 const struct snd_kcontrol_new *control = &controls[i];
1998 err = snd_ctl_add(card, snd_soc_cnew(control, platform,
1999 control->name, NULL));
2000 if (err < 0) {
2001 dev_err(platform->dev, "Failed to add %s %d\n",control->name, err);
2002 return err;
2003 }
2004 }
2005
2006 return 0;
2007}
2008EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2009
2010/**
2011 * snd_soc_info_enum_double - enumerated double mixer info callback
2012 * @kcontrol: mixer control
2013 * @uinfo: control element information
2014 *
2015 * Callback to provide information about a double enumerated
2016 * mixer control.
2017 *
2018 * Returns 0 for success.
2019 */
2020int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2021 struct snd_ctl_elem_info *uinfo)
2022{
2023 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2024
2025 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2026 uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2027 uinfo->value.enumerated.items = e->max;
2028
2029 if (uinfo->value.enumerated.item > e->max - 1)
2030 uinfo->value.enumerated.item = e->max - 1;
2031 strcpy(uinfo->value.enumerated.name,
2032 e->texts[uinfo->value.enumerated.item]);
2033 return 0;
2034}
2035EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2036
2037/**
2038 * snd_soc_get_enum_double - enumerated double mixer get callback
2039 * @kcontrol: mixer control
2040 * @ucontrol: control element information
2041 *
2042 * Callback to get the value of a double enumerated mixer.
2043 *
2044 * Returns 0 for success.
2045 */
2046int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2047 struct snd_ctl_elem_value *ucontrol)
2048{
2049 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2050 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2051 unsigned int val, bitmask;
2052
2053 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2054 ;
2055 val = snd_soc_read(codec, e->reg);
2056 ucontrol->value.enumerated.item[0]
2057 = (val >> e->shift_l) & (bitmask - 1);
2058 if (e->shift_l != e->shift_r)
2059 ucontrol->value.enumerated.item[1] =
2060 (val >> e->shift_r) & (bitmask - 1);
2061
2062 return 0;
2063}
2064EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2065
2066/**
2067 * snd_soc_put_enum_double - enumerated double mixer put callback
2068 * @kcontrol: mixer control
2069 * @ucontrol: control element information
2070 *
2071 * Callback to set the value of a double enumerated mixer.
2072 *
2073 * Returns 0 for success.
2074 */
2075int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2076 struct snd_ctl_elem_value *ucontrol)
2077{
2078 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2079 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2080 unsigned int val;
2081 unsigned int mask, bitmask;
2082
2083 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2084 ;
2085 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2086 return -EINVAL;
2087 val = ucontrol->value.enumerated.item[0] << e->shift_l;
2088 mask = (bitmask - 1) << e->shift_l;
2089 if (e->shift_l != e->shift_r) {
2090 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2091 return -EINVAL;
2092 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2093 mask |= (bitmask - 1) << e->shift_r;
2094 }
2095
2096 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2097}
2098EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2099
2100/**
2101 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2102 * @kcontrol: mixer control
2103 * @ucontrol: control element information
2104 *
2105 * Callback to get the value of a double semi enumerated mixer.
2106 *
2107 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2108 * used for handling bitfield coded enumeration for example.
2109 *
2110 * Returns 0 for success.
2111 */
2112int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2113 struct snd_ctl_elem_value *ucontrol)
2114{
2115 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2116 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2117 unsigned int reg_val, val, mux;
2118
2119 reg_val = snd_soc_read(codec, e->reg);
2120 val = (reg_val >> e->shift_l) & e->mask;
2121 for (mux = 0; mux < e->max; mux++) {
2122 if (val == e->values[mux])
2123 break;
2124 }
2125 ucontrol->value.enumerated.item[0] = mux;
2126 if (e->shift_l != e->shift_r) {
2127 val = (reg_val >> e->shift_r) & e->mask;
2128 for (mux = 0; mux < e->max; mux++) {
2129 if (val == e->values[mux])
2130 break;
2131 }
2132 ucontrol->value.enumerated.item[1] = mux;
2133 }
2134
2135 return 0;
2136}
2137EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2138
2139/**
2140 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2141 * @kcontrol: mixer control
2142 * @ucontrol: control element information
2143 *
2144 * Callback to set the value of a double semi enumerated mixer.
2145 *
2146 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2147 * used for handling bitfield coded enumeration for example.
2148 *
2149 * Returns 0 for success.
2150 */
2151int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2152 struct snd_ctl_elem_value *ucontrol)
2153{
2154 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2155 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2156 unsigned int val;
2157 unsigned int mask;
2158
2159 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2160 return -EINVAL;
2161 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2162 mask = e->mask << e->shift_l;
2163 if (e->shift_l != e->shift_r) {
2164 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2165 return -EINVAL;
2166 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2167 mask |= e->mask << e->shift_r;
2168 }
2169
2170 return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2171}
2172EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2173
2174/**
2175 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2176 * @kcontrol: mixer control
2177 * @uinfo: control element information
2178 *
2179 * Callback to provide information about an external enumerated
2180 * single mixer.
2181 *
2182 * Returns 0 for success.
2183 */
2184int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2185 struct snd_ctl_elem_info *uinfo)
2186{
2187 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2188
2189 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2190 uinfo->count = 1;
2191 uinfo->value.enumerated.items = e->max;
2192
2193 if (uinfo->value.enumerated.item > e->max - 1)
2194 uinfo->value.enumerated.item = e->max - 1;
2195 strcpy(uinfo->value.enumerated.name,
2196 e->texts[uinfo->value.enumerated.item]);
2197 return 0;
2198}
2199EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2200
2201/**
2202 * snd_soc_info_volsw_ext - external single mixer info callback
2203 * @kcontrol: mixer control
2204 * @uinfo: control element information
2205 *
2206 * Callback to provide information about a single external mixer control.
2207 *
2208 * Returns 0 for success.
2209 */
2210int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2211 struct snd_ctl_elem_info *uinfo)
2212{
2213 int max = kcontrol->private_value;
2214
2215 if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2216 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2217 else
2218 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2219
2220 uinfo->count = 1;
2221 uinfo->value.integer.min = 0;
2222 uinfo->value.integer.max = max;
2223 return 0;
2224}
2225EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2226
2227/**
2228 * snd_soc_info_volsw - single mixer info callback
2229 * @kcontrol: mixer control
2230 * @uinfo: control element information
2231 *
2232 * Callback to provide information about a single mixer control.
2233 *
2234 * Returns 0 for success.
2235 */
2236int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2237 struct snd_ctl_elem_info *uinfo)
2238{
2239 struct soc_mixer_control *mc =
2240 (struct soc_mixer_control *)kcontrol->private_value;
2241 int platform_max;
2242 unsigned int shift = mc->shift;
2243 unsigned int rshift = mc->rshift;
2244
2245 if (!mc->platform_max)
2246 mc->platform_max = mc->max;
2247 platform_max = mc->platform_max;
2248
2249 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2250 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2251 else
2252 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2253
2254 uinfo->count = shift == rshift ? 1 : 2;
2255 uinfo->value.integer.min = 0;
2256 uinfo->value.integer.max = platform_max;
2257 return 0;
2258}
2259EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2260
2261/**
2262 * snd_soc_get_volsw - single mixer get callback
2263 * @kcontrol: mixer control
2264 * @ucontrol: control element information
2265 *
2266 * Callback to get the value of a single mixer control.
2267 *
2268 * Returns 0 for success.
2269 */
2270int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2271 struct snd_ctl_elem_value *ucontrol)
2272{
2273 struct soc_mixer_control *mc =
2274 (struct soc_mixer_control *)kcontrol->private_value;
2275 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2276 unsigned int reg = mc->reg;
2277 unsigned int shift = mc->shift;
2278 unsigned int rshift = mc->rshift;
2279 int max = mc->max;
2280 unsigned int mask = (1 << fls(max)) - 1;
2281 unsigned int invert = mc->invert;
2282
2283 ucontrol->value.integer.value[0] =
2284 (snd_soc_read(codec, reg) >> shift) & mask;
2285 if (shift != rshift)
2286 ucontrol->value.integer.value[1] =
2287 (snd_soc_read(codec, reg) >> rshift) & mask;
2288 if (invert) {
2289 ucontrol->value.integer.value[0] =
2290 max - ucontrol->value.integer.value[0];
2291 if (shift != rshift)
2292 ucontrol->value.integer.value[1] =
2293 max - ucontrol->value.integer.value[1];
2294 }
2295
2296 return 0;
2297}
2298EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2299
2300/**
2301 * snd_soc_put_volsw - single mixer put callback
2302 * @kcontrol: mixer control
2303 * @ucontrol: control element information
2304 *
2305 * Callback to set the value of a single mixer control.
2306 *
2307 * Returns 0 for success.
2308 */
2309int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2310 struct snd_ctl_elem_value *ucontrol)
2311{
2312 struct soc_mixer_control *mc =
2313 (struct soc_mixer_control *)kcontrol->private_value;
2314 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2315 unsigned int reg = mc->reg;
2316 unsigned int shift = mc->shift;
2317 unsigned int rshift = mc->rshift;
2318 int max = mc->max;
2319 unsigned int mask = (1 << fls(max)) - 1;
2320 unsigned int invert = mc->invert;
2321 unsigned int val, val2, val_mask;
2322
2323 val = (ucontrol->value.integer.value[0] & mask);
2324 if (invert)
2325 val = max - val;
2326 val_mask = mask << shift;
2327 val = val << shift;
2328 if (shift != rshift) {
2329 val2 = (ucontrol->value.integer.value[1] & mask);
2330 if (invert)
2331 val2 = max - val2;
2332 val_mask |= mask << rshift;
2333 val |= val2 << rshift;
2334 }
2335 return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2336}
2337EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2338
2339/**
2340 * snd_soc_info_volsw_2r - double mixer info callback
2341 * @kcontrol: mixer control
2342 * @uinfo: control element information
2343 *
2344 * Callback to provide information about a double mixer control that
2345 * spans 2 codec registers.
2346 *
2347 * Returns 0 for success.
2348 */
2349int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
2350 struct snd_ctl_elem_info *uinfo)
2351{
2352 struct soc_mixer_control *mc =
2353 (struct soc_mixer_control *)kcontrol->private_value;
2354 int platform_max;
2355
2356 if (!mc->platform_max)
2357 mc->platform_max = mc->max;
2358 platform_max = mc->platform_max;
2359
2360 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2361 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2362 else
2363 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2364
2365 uinfo->count = 2;
2366 uinfo->value.integer.min = 0;
2367 uinfo->value.integer.max = platform_max;
2368 return 0;
2369}
2370EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
2371
2372/**
2373 * snd_soc_get_volsw_2r - double mixer get callback
2374 * @kcontrol: mixer control
2375 * @ucontrol: control element information
2376 *
2377 * Callback to get the value of a double mixer control that spans 2 registers.
2378 *
2379 * Returns 0 for success.
2380 */
2381int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
2382 struct snd_ctl_elem_value *ucontrol)
2383{
2384 struct soc_mixer_control *mc =
2385 (struct soc_mixer_control *)kcontrol->private_value;
2386 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2387 unsigned int reg = mc->reg;
2388 unsigned int reg2 = mc->rreg;
2389 unsigned int shift = mc->shift;
2390 int max = mc->max;
2391 unsigned int mask = (1 << fls(max)) - 1;
2392 unsigned int invert = mc->invert;
2393
2394 ucontrol->value.integer.value[0] =
2395 (snd_soc_read(codec, reg) >> shift) & mask;
2396 ucontrol->value.integer.value[1] =
2397 (snd_soc_read(codec, reg2) >> shift) & mask;
2398 if (invert) {
2399 ucontrol->value.integer.value[0] =
2400 max - ucontrol->value.integer.value[0];
2401 ucontrol->value.integer.value[1] =
2402 max - ucontrol->value.integer.value[1];
2403 }
2404
2405 return 0;
2406}
2407EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
2408
2409/**
2410 * snd_soc_put_volsw_2r - double mixer set callback
2411 * @kcontrol: mixer control
2412 * @ucontrol: control element information
2413 *
2414 * Callback to set the value of a double mixer control that spans 2 registers.
2415 *
2416 * Returns 0 for success.
2417 */
2418int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
2419 struct snd_ctl_elem_value *ucontrol)
2420{
2421 struct soc_mixer_control *mc =
2422 (struct soc_mixer_control *)kcontrol->private_value;
2423 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2424 unsigned int reg = mc->reg;
2425 unsigned int reg2 = mc->rreg;
2426 unsigned int shift = mc->shift;
2427 int max = mc->max;
2428 unsigned int mask = (1 << fls(max)) - 1;
2429 unsigned int invert = mc->invert;
2430 int err;
2431 unsigned int val, val2, val_mask;
2432
2433 val_mask = mask << shift;
2434 val = (ucontrol->value.integer.value[0] & mask);
2435 val2 = (ucontrol->value.integer.value[1] & mask);
2436
2437 if (invert) {
2438 val = max - val;
2439 val2 = max - val2;
2440 }
2441
2442 val = val << shift;
2443 val2 = val2 << shift;
2444
2445 err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2446 if (err < 0)
2447 return err;
2448
2449 err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2450 return err;
2451}
2452EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
2453
2454/**
2455 * snd_soc_info_volsw_s8 - signed mixer info callback
2456 * @kcontrol: mixer control
2457 * @uinfo: control element information
2458 *
2459 * Callback to provide information about a signed mixer control.
2460 *
2461 * Returns 0 for success.
2462 */
2463int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2464 struct snd_ctl_elem_info *uinfo)
2465{
2466 struct soc_mixer_control *mc =
2467 (struct soc_mixer_control *)kcontrol->private_value;
2468 int platform_max;
2469 int min = mc->min;
2470
2471 if (!mc->platform_max)
2472 mc->platform_max = mc->max;
2473 platform_max = mc->platform_max;
2474
2475 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2476 uinfo->count = 2;
2477 uinfo->value.integer.min = 0;
2478 uinfo->value.integer.max = platform_max - min;
2479 return 0;
2480}
2481EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2482
2483/**
2484 * snd_soc_get_volsw_s8 - signed mixer get callback
2485 * @kcontrol: mixer control
2486 * @ucontrol: control element information
2487 *
2488 * Callback to get the value of a signed mixer control.
2489 *
2490 * Returns 0 for success.
2491 */
2492int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2493 struct snd_ctl_elem_value *ucontrol)
2494{
2495 struct soc_mixer_control *mc =
2496 (struct soc_mixer_control *)kcontrol->private_value;
2497 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2498 unsigned int reg = mc->reg;
2499 int min = mc->min;
2500 int val = snd_soc_read(codec, reg);
2501
2502 ucontrol->value.integer.value[0] =
2503 ((signed char)(val & 0xff))-min;
2504 ucontrol->value.integer.value[1] =
2505 ((signed char)((val >> 8) & 0xff))-min;
2506 return 0;
2507}
2508EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2509
2510/**
2511 * snd_soc_put_volsw_sgn - signed mixer put callback
2512 * @kcontrol: mixer control
2513 * @ucontrol: control element information
2514 *
2515 * Callback to set the value of a signed mixer control.
2516 *
2517 * Returns 0 for success.
2518 */
2519int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2520 struct snd_ctl_elem_value *ucontrol)
2521{
2522 struct soc_mixer_control *mc =
2523 (struct soc_mixer_control *)kcontrol->private_value;
2524 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2525 unsigned int reg = mc->reg;
2526 int min = mc->min;
2527 unsigned int val;
2528
2529 val = (ucontrol->value.integer.value[0]+min) & 0xff;
2530 val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2531
2532 return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2533}
2534EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2535
2536/**
2537 * snd_soc_limit_volume - Set new limit to an existing volume control.
2538 *
2539 * @codec: where to look for the control
2540 * @name: Name of the control
2541 * @max: new maximum limit
2542 *
2543 * Return 0 for success, else error.
2544 */
2545int snd_soc_limit_volume(struct snd_soc_codec *codec,
2546 const char *name, int max)
2547{
2548 struct snd_card *card = codec->card->snd_card;
2549 struct snd_kcontrol *kctl;
2550 struct soc_mixer_control *mc;
2551 int found = 0;
2552 int ret = -EINVAL;
2553
2554 /* Sanity check for name and max */
2555 if (unlikely(!name || max <= 0))
2556 return -EINVAL;
2557
2558 list_for_each_entry(kctl, &card->controls, list) {
2559 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
2560 found = 1;
2561 break;
2562 }
2563 }
2564 if (found) {
2565 mc = (struct soc_mixer_control *)kctl->private_value;
2566 if (max <= mc->max) {
2567 mc->platform_max = max;
2568 ret = 0;
2569 }
2570 }
2571 return ret;
2572}
2573EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
2574
2575/**
2576 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
2577 * mixer info callback
2578 * @kcontrol: mixer control
2579 * @uinfo: control element information
2580 *
2581 * Returns 0 for success.
2582 */
2583int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2584 struct snd_ctl_elem_info *uinfo)
2585{
2586 struct soc_mixer_control *mc =
2587 (struct soc_mixer_control *)kcontrol->private_value;
2588 int max = mc->max;
2589 int min = mc->min;
2590
2591 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2592 uinfo->count = 2;
2593 uinfo->value.integer.min = 0;
2594 uinfo->value.integer.max = max-min;
2595
2596 return 0;
2597}
2598EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);
2599
2600/**
2601 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
2602 * mixer get callback
2603 * @kcontrol: mixer control
2604 * @uinfo: control element information
2605 *
2606 * Returns 0 for success.
2607 */
2608int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2609 struct snd_ctl_elem_value *ucontrol)
2610{
2611 struct soc_mixer_control *mc =
2612 (struct soc_mixer_control *)kcontrol->private_value;
2613 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2614 unsigned int mask = (1<<mc->shift)-1;
2615 int min = mc->min;
2616 int val = snd_soc_read(codec, mc->reg) & mask;
2617 int valr = snd_soc_read(codec, mc->rreg) & mask;
2618
2619 ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
2620 ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2621 return 0;
2622}
2623EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);
2624
2625/**
2626 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
2627 * mixer put callback
2628 * @kcontrol: mixer control
2629 * @uinfo: control element information
2630 *
2631 * Returns 0 for success.
2632 */
2633int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
2634 struct snd_ctl_elem_value *ucontrol)
2635{
2636 struct soc_mixer_control *mc =
2637 (struct soc_mixer_control *)kcontrol->private_value;
2638 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2639 unsigned int mask = (1<<mc->shift)-1;
2640 int min = mc->min;
2641 int ret;
2642 unsigned int val, valr, oval, ovalr;
2643
2644 val = ((ucontrol->value.integer.value[0]+min) & 0xff);
2645 val &= mask;
2646 valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
2647 valr &= mask;
2648
2649 oval = snd_soc_read(codec, mc->reg) & mask;
2650 ovalr = snd_soc_read(codec, mc->rreg) & mask;
2651
2652 ret = 0;
2653 if (oval != val) {
2654 ret = snd_soc_write(codec, mc->reg, val);
2655 if (ret < 0)
2656 return ret;
2657 }
2658 if (ovalr != valr) {
2659 ret = snd_soc_write(codec, mc->rreg, valr);
2660 if (ret < 0)
2661 return ret;
2662 }
2663
2664 return 0;
2665}
2666EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
2667
2668/**
2669 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2670 * @dai: DAI
2671 * @clk_id: DAI specific clock ID
2672 * @freq: new clock frequency in Hz
2673 * @dir: new clock direction - input/output.
2674 *
2675 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2676 */
2677int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2678 unsigned int freq, int dir)
2679{
2680 if (dai->driver && dai->driver->ops->set_sysclk)
2681 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2682 else if (dai->codec && dai->codec->driver->set_sysclk)
2683 return dai->codec->driver->set_sysclk(dai->codec, clk_id,
2684 freq, dir);
2685 else
2686 return -EINVAL;
2687}
2688EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2689
2690/**
2691 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2692 * @codec: CODEC
2693 * @clk_id: DAI specific clock ID
2694 * @freq: new clock frequency in Hz
2695 * @dir: new clock direction - input/output.
2696 *
2697 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2698 */
2699int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2700 unsigned int freq, int dir)
2701{
2702 if (codec->driver->set_sysclk)
2703 return codec->driver->set_sysclk(codec, clk_id, freq, dir);
2704 else
2705 return -EINVAL;
2706}
2707EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2708
2709/**
2710 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2711 * @dai: DAI
2712 * @div_id: DAI specific clock divider ID
2713 * @div: new clock divisor.
2714 *
2715 * Configures the clock dividers. This is used to derive the best DAI bit and
2716 * frame clocks from the system or master clock. It's best to set the DAI bit
2717 * and frame clocks as low as possible to save system power.
2718 */
2719int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2720 int div_id, int div)
2721{
2722 if (dai->driver && dai->driver->ops->set_clkdiv)
2723 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2724 else
2725 return -EINVAL;
2726}
2727EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2728
2729/**
2730 * snd_soc_dai_set_pll - configure DAI PLL.
2731 * @dai: DAI
2732 * @pll_id: DAI specific PLL ID
2733 * @source: DAI specific source for the PLL
2734 * @freq_in: PLL input clock frequency in Hz
2735 * @freq_out: requested PLL output clock frequency in Hz
2736 *
2737 * Configures and enables PLL to generate output clock based on input clock.
2738 */
2739int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2740 unsigned int freq_in, unsigned int freq_out)
2741{
2742 if (dai->driver && dai->driver->ops->set_pll)
2743 return dai->driver->ops->set_pll(dai, pll_id, source,
2744 freq_in, freq_out);
2745 else if (dai->codec && dai->codec->driver->set_pll)
2746 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2747 freq_in, freq_out);
2748 else
2749 return -EINVAL;
2750}
2751EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2752
2753/*
2754 * snd_soc_codec_set_pll - configure codec PLL.
2755 * @codec: CODEC
2756 * @pll_id: DAI specific PLL ID
2757 * @source: DAI specific source for the PLL
2758 * @freq_in: PLL input clock frequency in Hz
2759 * @freq_out: requested PLL output clock frequency in Hz
2760 *
2761 * Configures and enables PLL to generate output clock based on input clock.
2762 */
2763int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2764 unsigned int freq_in, unsigned int freq_out)
2765{
2766 if (codec->driver->set_pll)
2767 return codec->driver->set_pll(codec, pll_id, source,
2768 freq_in, freq_out);
2769 else
2770 return -EINVAL;
2771}
2772EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2773
2774/**
2775 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2776 * @dai: DAI
2777 * @fmt: SND_SOC_DAIFMT_ format value.
2778 *
2779 * Configures the DAI hardware format and clocking.
2780 */
2781int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2782{
2783 if (dai->driver && dai->driver->ops->set_fmt)
2784 return dai->driver->ops->set_fmt(dai, fmt);
2785 else
2786 return -EINVAL;
2787}
2788EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2789
2790/**
2791 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2792 * @dai: DAI
2793 * @tx_mask: bitmask representing active TX slots.
2794 * @rx_mask: bitmask representing active RX slots.
2795 * @slots: Number of slots in use.
2796 * @slot_width: Width in bits for each slot.
2797 *
2798 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2799 * specific.
2800 */
2801int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2802 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2803{
2804 if (dai->driver && dai->driver->ops->set_tdm_slot)
2805 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2806 slots, slot_width);
2807 else
2808 return -EINVAL;
2809}
2810EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2811
2812/**
2813 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2814 * @dai: DAI
2815 * @tx_num: how many TX channels
2816 * @tx_slot: pointer to an array which imply the TX slot number channel
2817 * 0~num-1 uses
2818 * @rx_num: how many RX channels
2819 * @rx_slot: pointer to an array which imply the RX slot number channel
2820 * 0~num-1 uses
2821 *
2822 * configure the relationship between channel number and TDM slot number.
2823 */
2824int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2825 unsigned int tx_num, unsigned int *tx_slot,
2826 unsigned int rx_num, unsigned int *rx_slot)
2827{
2828 if (dai->driver && dai->driver->ops->set_channel_map)
2829 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2830 rx_num, rx_slot);
2831 else
2832 return -EINVAL;
2833}
2834EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2835
2836/**
2837 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2838 * @dai: DAI
2839 * @tristate: tristate enable
2840 *
2841 * Tristates the DAI so that others can use it.
2842 */
2843int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2844{
2845 if (dai->driver && dai->driver->ops->set_tristate)
2846 return dai->driver->ops->set_tristate(dai, tristate);
2847 else
2848 return -EINVAL;
2849}
2850EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2851
2852/**
2853 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2854 * @dai: DAI
2855 * @mute: mute enable
2856 *
2857 * Mutes the DAI DAC.
2858 */
2859int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
2860{
2861 if (dai->driver && dai->driver->ops->digital_mute)
2862 return dai->driver->ops->digital_mute(dai, mute);
2863 else
2864 return -EINVAL;
2865}
2866EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2867
2868/**
2869 * snd_soc_register_card - Register a card with the ASoC core
2870 *
2871 * @card: Card to register
2872 *
2873 */
2874int snd_soc_register_card(struct snd_soc_card *card)
2875{
2876 int i;
2877
2878 if (!card->name || !card->dev)
2879 return -EINVAL;
2880
2881 dev_set_drvdata(card->dev, card);
2882
2883 snd_soc_initialize_card_lists(card);
2884
2885 soc_init_card_debugfs(card);
2886
2887 card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
2888 (card->num_links + card->num_aux_devs),
2889 GFP_KERNEL);
2890 if (card->rtd == NULL)
2891 return -ENOMEM;
2892 card->rtd_aux = &card->rtd[card->num_links];
2893
2894 for (i = 0; i < card->num_links; i++)
2895 card->rtd[i].dai_link = &card->dai_link[i];
2896
2897 INIT_LIST_HEAD(&card->list);
2898 card->instantiated = 0;
2899 mutex_init(&card->mutex);
2900
2901 mutex_lock(&client_mutex);
2902 list_add(&card->list, &card_list);
2903 snd_soc_instantiate_cards();
2904 mutex_unlock(&client_mutex);
2905
2906 dev_dbg(card->dev, "Registered card '%s'\n", card->name);
2907
2908 return 0;
2909}
2910EXPORT_SYMBOL_GPL(snd_soc_register_card);
2911
2912/**
2913 * snd_soc_unregister_card - Unregister a card with the ASoC core
2914 *
2915 * @card: Card to unregister
2916 *
2917 */
2918int snd_soc_unregister_card(struct snd_soc_card *card)
2919{
2920 if (card->instantiated)
2921 soc_cleanup_card_resources(card);
2922 mutex_lock(&client_mutex);
2923 list_del(&card->list);
2924 mutex_unlock(&client_mutex);
2925 dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
2926
2927 return 0;
2928}
2929EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2930
2931/*
2932 * Simplify DAI link configuration by removing ".-1" from device names
2933 * and sanitizing names.
2934 */
2935static char *fmt_single_name(struct device *dev, int *id)
2936{
2937 char *found, name[NAME_SIZE];
2938 int id1, id2;
2939
2940 if (dev_name(dev) == NULL)
2941 return NULL;
2942
2943 strlcpy(name, dev_name(dev), NAME_SIZE);
2944
2945 /* are we a "%s.%d" name (platform and SPI components) */
2946 found = strstr(name, dev->driver->name);
2947 if (found) {
2948 /* get ID */
2949 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2950
2951 /* discard ID from name if ID == -1 */
2952 if (*id == -1)
2953 found[strlen(dev->driver->name)] = '\0';
2954 }
2955
2956 } else {
2957 /* I2C component devices are named "bus-addr" */
2958 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2959 char tmp[NAME_SIZE];
2960
2961 /* create unique ID number from I2C addr and bus */
2962 *id = ((id1 & 0xffff) << 16) + id2;
2963
2964 /* sanitize component name for DAI link creation */
2965 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2966 strlcpy(name, tmp, NAME_SIZE);
2967 } else
2968 *id = 0;
2969 }
2970
2971 return kstrdup(name, GFP_KERNEL);
2972}
2973
2974/*
2975 * Simplify DAI link naming for single devices with multiple DAIs by removing
2976 * any ".-1" and using the DAI name (instead of device name).
2977 */
2978static inline char *fmt_multiple_name(struct device *dev,
2979 struct snd_soc_dai_driver *dai_drv)
2980{
2981 if (dai_drv->name == NULL) {
2982 printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
2983 dev_name(dev));
2984 return NULL;
2985 }
2986
2987 return kstrdup(dai_drv->name, GFP_KERNEL);
2988}
2989
2990/**
2991 * snd_soc_register_dai - Register a DAI with the ASoC core
2992 *
2993 * @dai: DAI to register
2994 */
2995int snd_soc_register_dai(struct device *dev,
2996 struct snd_soc_dai_driver *dai_drv)
2997{
2998 struct snd_soc_dai *dai;
2999
3000 dev_dbg(dev, "dai register %s\n", dev_name(dev));
3001
3002 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3003 if (dai == NULL)
3004 return -ENOMEM;
3005
3006 /* create DAI component name */
3007 dai->name = fmt_single_name(dev, &dai->id);
3008 if (dai->name == NULL) {
3009 kfree(dai);
3010 return -ENOMEM;
3011 }
3012
3013 dai->dev = dev;
3014 dai->driver = dai_drv;
3015 if (!dai->driver->ops)
3016 dai->driver->ops = &null_dai_ops;
3017
3018 mutex_lock(&client_mutex);
3019 list_add(&dai->list, &dai_list);
3020 snd_soc_instantiate_cards();
3021 mutex_unlock(&client_mutex);
3022
3023 pr_debug("Registered DAI '%s'\n", dai->name);
3024
3025 return 0;
3026}
3027EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3028
3029/**
3030 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3031 *
3032 * @dai: DAI to unregister
3033 */
3034void snd_soc_unregister_dai(struct device *dev)
3035{
3036 struct snd_soc_dai *dai;
3037
3038 list_for_each_entry(dai, &dai_list, list) {
3039 if (dev == dai->dev)
3040 goto found;
3041 }
3042 return;
3043
3044found:
3045 mutex_lock(&client_mutex);
3046 list_del(&dai->list);
3047 mutex_unlock(&client_mutex);
3048
3049 pr_debug("Unregistered DAI '%s'\n", dai->name);
3050 kfree(dai->name);
3051 kfree(dai);
3052}
3053EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3054
3055/**
3056 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3057 *
3058 * @dai: Array of DAIs to register
3059 * @count: Number of DAIs
3060 */
3061int snd_soc_register_dais(struct device *dev,
3062 struct snd_soc_dai_driver *dai_drv, size_t count)
3063{
3064 struct snd_soc_dai *dai;
3065 int i, ret = 0;
3066
3067 dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3068
3069 for (i = 0; i < count; i++) {
3070
3071 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3072 if (dai == NULL) {
3073 ret = -ENOMEM;
3074 goto err;
3075 }
3076
3077 /* create DAI component name */
3078 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3079 if (dai->name == NULL) {
3080 kfree(dai);
3081 ret = -EINVAL;
3082 goto err;
3083 }
3084
3085 dai->dev = dev;
3086 dai->driver = &dai_drv[i];
3087 if (dai->driver->id)
3088 dai->id = dai->driver->id;
3089 else
3090 dai->id = i;
3091 if (!dai->driver->ops)
3092 dai->driver->ops = &null_dai_ops;
3093
3094 mutex_lock(&client_mutex);
3095 list_add(&dai->list, &dai_list);
3096 mutex_unlock(&client_mutex);
3097
3098 pr_debug("Registered DAI '%s'\n", dai->name);
3099 }
3100
3101 mutex_lock(&client_mutex);
3102 snd_soc_instantiate_cards();
3103 mutex_unlock(&client_mutex);
3104 return 0;
3105
3106err:
3107 for (i--; i >= 0; i--)
3108 snd_soc_unregister_dai(dev);
3109
3110 return ret;
3111}
3112EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3113
3114/**
3115 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3116 *
3117 * @dai: Array of DAIs to unregister
3118 * @count: Number of DAIs
3119 */
3120void snd_soc_unregister_dais(struct device *dev, size_t count)
3121{
3122 int i;
3123
3124 for (i = 0; i < count; i++)
3125 snd_soc_unregister_dai(dev);
3126}
3127EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3128
3129/**
3130 * snd_soc_register_platform - Register a platform with the ASoC core
3131 *
3132 * @platform: platform to register
3133 */
3134int snd_soc_register_platform(struct device *dev,
3135 struct snd_soc_platform_driver *platform_drv)
3136{
3137 struct snd_soc_platform *platform;
3138
3139 dev_dbg(dev, "platform register %s\n", dev_name(dev));
3140
3141 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3142 if (platform == NULL)
3143 return -ENOMEM;
3144
3145 /* create platform component name */
3146 platform->name = fmt_single_name(dev, &platform->id);
3147 if (platform->name == NULL) {
3148 kfree(platform);
3149 return -ENOMEM;
3150 }
3151
3152 platform->dev = dev;
3153 platform->driver = platform_drv;
3154 platform->dapm.dev = dev;
3155 platform->dapm.platform = platform;
3156
3157 mutex_lock(&client_mutex);
3158 list_add(&platform->list, &platform_list);
3159 snd_soc_instantiate_cards();
3160 mutex_unlock(&client_mutex);
3161
3162 pr_debug("Registered platform '%s'\n", platform->name);
3163
3164 return 0;
3165}
3166EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3167
3168/**
3169 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3170 *
3171 * @platform: platform to unregister
3172 */
3173void snd_soc_unregister_platform(struct device *dev)
3174{
3175 struct snd_soc_platform *platform;
3176
3177 list_for_each_entry(platform, &platform_list, list) {
3178 if (dev == platform->dev)
3179 goto found;
3180 }
3181 return;
3182
3183found:
3184 mutex_lock(&client_mutex);
3185 list_del(&platform->list);
3186 mutex_unlock(&client_mutex);
3187
3188 pr_debug("Unregistered platform '%s'\n", platform->name);
3189 kfree(platform->name);
3190 kfree(platform);
3191}
3192EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3193
3194static u64 codec_format_map[] = {
3195 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3196 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3197 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3198 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3199 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3200 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3201 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3202 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3203 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3204 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3205 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3206 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3207 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3208 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3209 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3210 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3211};
3212
3213/* Fix up the DAI formats for endianness: codecs don't actually see
3214 * the endianness of the data but we're using the CPU format
3215 * definitions which do need to include endianness so we ensure that
3216 * codec DAIs always have both big and little endian variants set.
3217 */
3218static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3219{
3220 int i;
3221
3222 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3223 if (stream->formats & codec_format_map[i])
3224 stream->formats |= codec_format_map[i];
3225}
3226
3227/**
3228 * snd_soc_register_codec - Register a codec with the ASoC core
3229 *
3230 * @codec: codec to register
3231 */
3232int snd_soc_register_codec(struct device *dev,
3233 const struct snd_soc_codec_driver *codec_drv,
3234 struct snd_soc_dai_driver *dai_drv,
3235 int num_dai)
3236{
3237 size_t reg_size;
3238 struct snd_soc_codec *codec;
3239 int ret, i;
3240
3241 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3242
3243 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3244 if (codec == NULL)
3245 return -ENOMEM;
3246
3247 /* create CODEC component name */
3248 codec->name = fmt_single_name(dev, &codec->id);
3249 if (codec->name == NULL) {
3250 kfree(codec);
3251 return -ENOMEM;
3252 }
3253
3254 if (codec_drv->compress_type)
3255 codec->compress_type = codec_drv->compress_type;
3256 else
3257 codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3258
3259 codec->write = codec_drv->write;
3260 codec->read = codec_drv->read;
3261 codec->volatile_register = codec_drv->volatile_register;
3262 codec->readable_register = codec_drv->readable_register;
3263 codec->writable_register = codec_drv->writable_register;
3264 codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3265 codec->dapm.dev = dev;
3266 codec->dapm.codec = codec;
3267 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3268 codec->dev = dev;
3269 codec->driver = codec_drv;
3270 codec->num_dai = num_dai;
3271 mutex_init(&codec->mutex);
3272
3273 /* allocate CODEC register cache */
3274 if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3275 reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3276 codec->reg_size = reg_size;
3277 /* it is necessary to make a copy of the default register cache
3278 * because in the case of using a compression type that requires
3279 * the default register cache to be marked as __devinitconst the
3280 * kernel might have freed the array by the time we initialize
3281 * the cache.
3282 */
3283 if (codec_drv->reg_cache_default) {
3284 codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
3285 reg_size, GFP_KERNEL);
3286 if (!codec->reg_def_copy) {
3287 ret = -ENOMEM;
3288 goto fail;
3289 }
3290 }
3291 }
3292
3293 if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
3294 if (!codec->volatile_register)
3295 codec->volatile_register = snd_soc_default_volatile_register;
3296 if (!codec->readable_register)
3297 codec->readable_register = snd_soc_default_readable_register;
3298 if (!codec->writable_register)
3299 codec->writable_register = snd_soc_default_writable_register;
3300 }
3301
3302 for (i = 0; i < num_dai; i++) {
3303 fixup_codec_formats(&dai_drv[i].playback);
3304 fixup_codec_formats(&dai_drv[i].capture);
3305 }
3306
3307 /* register any DAIs */
3308 if (num_dai) {
3309 ret = snd_soc_register_dais(dev, dai_drv, num_dai);
3310 if (ret < 0)
3311 goto fail;
3312 }
3313
3314 mutex_lock(&client_mutex);
3315 list_add(&codec->list, &codec_list);
3316 snd_soc_instantiate_cards();
3317 mutex_unlock(&client_mutex);
3318
3319 pr_debug("Registered codec '%s'\n", codec->name);
3320 return 0;
3321
3322fail:
3323 kfree(codec->reg_def_copy);
3324 codec->reg_def_copy = NULL;
3325 kfree(codec->name);
3326 kfree(codec);
3327 return ret;
3328}
3329EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3330
3331/**
3332 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3333 *
3334 * @codec: codec to unregister
3335 */
3336void snd_soc_unregister_codec(struct device *dev)
3337{
3338 struct snd_soc_codec *codec;
3339 int i;
3340
3341 list_for_each_entry(codec, &codec_list, list) {
3342 if (dev == codec->dev)
3343 goto found;
3344 }
3345 return;
3346
3347found:
3348 if (codec->num_dai)
3349 for (i = 0; i < codec->num_dai; i++)
3350 snd_soc_unregister_dai(dev);
3351
3352 mutex_lock(&client_mutex);
3353 list_del(&codec->list);
3354 mutex_unlock(&client_mutex);
3355
3356 pr_debug("Unregistered codec '%s'\n", codec->name);
3357
3358 snd_soc_cache_exit(codec);
3359 kfree(codec->reg_def_copy);
3360 kfree(codec->name);
3361 kfree(codec);
3362}
3363EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3364
3365static int __init snd_soc_init(void)
3366{
3367#ifdef CONFIG_DEBUG_FS
3368 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3369 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3370 printk(KERN_WARNING
3371 "ASoC: Failed to create debugfs directory\n");
3372 snd_soc_debugfs_root = NULL;
3373 }
3374
3375 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3376 &codec_list_fops))
3377 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3378
3379 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3380 &dai_list_fops))
3381 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3382
3383 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3384 &platform_list_fops))
3385 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3386#endif
3387
3388 snd_soc_util_init();
3389
3390 return platform_driver_register(&soc_driver);
3391}
3392module_init(snd_soc_init);
3393
3394static void __exit snd_soc_exit(void)
3395{
3396 snd_soc_util_exit();
3397
3398#ifdef CONFIG_DEBUG_FS
3399 debugfs_remove_recursive(snd_soc_debugfs_root);
3400#endif
3401 platform_driver_unregister(&soc_driver);
3402}
3403module_exit(snd_soc_exit);
3404
3405/* Module information */
3406MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3407MODULE_DESCRIPTION("ALSA SoC Core");
3408MODULE_LICENSE("GPL");
3409MODULE_ALIAS("platform:soc-audio");
1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-core.c -- ALSA SoC Audio Layer
4//
5// Copyright 2005 Wolfson Microelectronics PLC.
6// Copyright 2005 Openedhand Ltd.
7// Copyright (C) 2010 Slimlogic Ltd.
8// Copyright (C) 2010 Texas Instruments Inc.
9//
10// Author: Liam Girdwood <lrg@slimlogic.co.uk>
11// with code, comments and ideas from :-
12// Richard Purdie <richard@openedhand.com>
13//
14// TODO:
15// o Add hw rules to enforce rates, etc.
16// o More testing with other codecs/machines.
17// o Add more codecs and platforms to ensure good API coverage.
18// o Support TDM on PCM and I2S
19
20#include <linux/module.h>
21#include <linux/moduleparam.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/pm.h>
25#include <linux/bitops.h>
26#include <linux/debugfs.h>
27#include <linux/platform_device.h>
28#include <linux/pinctrl/consumer.h>
29#include <linux/ctype.h>
30#include <linux/slab.h>
31#include <linux/of.h>
32#include <linux/of_graph.h>
33#include <linux/dmi.h>
34#include <linux/acpi.h>
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/soc.h>
39#include <sound/soc-dpcm.h>
40#include <sound/soc-topology.h>
41#include <sound/soc-link.h>
42#include <sound/initval.h>
43
44#define CREATE_TRACE_POINTS
45#include <trace/events/asoc.h>
46
47static DEFINE_MUTEX(client_mutex);
48static LIST_HEAD(component_list);
49static LIST_HEAD(unbind_card_list);
50
51#define for_each_component(component) \
52 list_for_each_entry(component, &component_list, list)
53
54/*
55 * This is used if driver don't need to have CPU/Codec/Platform
56 * dai_link. see soc.h
57 */
58struct snd_soc_dai_link_component null_dailink_component[0];
59EXPORT_SYMBOL_GPL(null_dailink_component);
60
61/*
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
65 */
66static int pmdown_time = 5000;
67module_param(pmdown_time, int, 0);
68MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69
70static ssize_t pmdown_time_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
72{
73 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
74
75 return sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
76}
77
78static ssize_t pmdown_time_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
81{
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
83 int ret;
84
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
86 if (ret)
87 return ret;
88
89 return count;
90}
91
92static DEVICE_ATTR_RW(pmdown_time);
93
94static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
96 NULL
97};
98
99static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
101{
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
104
105 if (!rtd)
106 return 0;
107
108 if (attr == &dev_attr_pmdown_time.attr)
109 return attr->mode; /* always visible */
110 return rtd->dai_link->num_codecs ? attr->mode : 0; /* enabled only with codec */
111}
112
113static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
116};
117
118static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
121};
122
123static const struct attribute_group *soc_dev_attr_groups[] = {
124 &soc_dapm_dev_group,
125 &soc_dev_group,
126 NULL
127};
128
129#ifdef CONFIG_DEBUG_FS
130struct dentry *snd_soc_debugfs_root;
131EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
132
133static void soc_init_component_debugfs(struct snd_soc_component *component)
134{
135 if (!component->card->debugfs_card_root)
136 return;
137
138 if (component->debugfs_prefix) {
139 char *name;
140
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
143 if (name) {
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
146 kfree(name);
147 }
148 } else {
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
151 }
152
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
155}
156
157static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
158{
159 if (!component->debugfs_root)
160 return;
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
163}
164
165static int dai_list_show(struct seq_file *m, void *v)
166{
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
169
170 mutex_lock(&client_mutex);
171
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
175
176 mutex_unlock(&client_mutex);
177
178 return 0;
179}
180DEFINE_SHOW_ATTRIBUTE(dai_list);
181
182static int component_list_show(struct seq_file *m, void *v)
183{
184 struct snd_soc_component *component;
185
186 mutex_lock(&client_mutex);
187
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
190
191 mutex_unlock(&client_mutex);
192
193 return 0;
194}
195DEFINE_SHOW_ATTRIBUTE(component_list);
196
197static void soc_init_card_debugfs(struct snd_soc_card *card)
198{
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
201
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
203 &card->pop_time);
204
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
206}
207
208static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
209{
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
212}
213
214static void snd_soc_debugfs_init(void)
215{
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
217
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
219 &dai_list_fops);
220
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
223}
224
225static void snd_soc_debugfs_exit(void)
226{
227 debugfs_remove_recursive(snd_soc_debugfs_root);
228}
229
230#else
231
232static inline void soc_init_component_debugfs(struct snd_soc_component *component) { }
233static inline void soc_cleanup_component_debugfs(struct snd_soc_component *component) { }
234static inline void soc_init_card_debugfs(struct snd_soc_card *card) { }
235static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { }
236static inline void snd_soc_debugfs_init(void) { }
237static inline void snd_soc_debugfs_exit(void) { }
238
239#endif
240
241static int snd_soc_is_match_dai_args(const struct of_phandle_args *args1,
242 const struct of_phandle_args *args2)
243{
244 if (!args1 || !args2)
245 return 0;
246
247 if (args1->np != args2->np)
248 return 0;
249
250 for (int i = 0; i < args1->args_count; i++)
251 if (args1->args[i] != args2->args[i])
252 return 0;
253
254 return 1;
255}
256
257static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
258{
259 return !(dlc->dai_args || dlc->name || dlc->of_node);
260}
261
262static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
263{
264 return (dlc->name && dlc->of_node);
265}
266
267static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
268{
269 return !(dlc->dai_args || dlc->dai_name);
270}
271
272static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
273 struct snd_soc_dai *dai)
274{
275 if (!dlc)
276 return 0;
277
278 if (dlc->dai_args)
279 return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
280
281 if (!dlc->dai_name)
282 return 1;
283
284 /* see snd_soc_dai_name_get() */
285
286 if (dai->driver->name &&
287 strcmp(dlc->dai_name, dai->driver->name) == 0)
288 return 1;
289
290 if (strcmp(dlc->dai_name, dai->name) == 0)
291 return 1;
292
293 if (dai->component->name &&
294 strcmp(dlc->dai_name, dai->component->name) == 0)
295 return 1;
296
297 return 0;
298}
299
300const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
301{
302 /* see snd_soc_is_matching_dai() */
303 if (dai->driver->name)
304 return dai->driver->name;
305
306 if (dai->name)
307 return dai->name;
308
309 if (dai->component->name)
310 return dai->component->name;
311
312 return NULL;
313}
314EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
315
316static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
317 struct snd_soc_component *component)
318{
319 struct snd_soc_component *comp;
320 int i;
321
322 for_each_rtd_components(rtd, i, comp) {
323 /* already connected */
324 if (comp == component)
325 return 0;
326 }
327
328 /* see for_each_rtd_components */
329 rtd->components[rtd->num_components] = component;
330 rtd->num_components++;
331
332 return 0;
333}
334
335struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
337{
338 struct snd_soc_component *component;
339 int i;
340
341 if (!driver_name)
342 return NULL;
343
344 /*
345 * NOTE
346 *
347 * snd_soc_rtdcom_lookup() will find component from rtd by using
348 * specified driver name.
349 * But, if many components which have same driver name are connected
350 * to 1 rtd, this function will return 1st found component.
351 */
352 for_each_rtd_components(rtd, i, component) {
353 const char *component_name = component->driver->name;
354
355 if (!component_name)
356 continue;
357
358 if ((component_name == driver_name) ||
359 strcmp(component_name, driver_name) == 0)
360 return component;
361 }
362
363 return NULL;
364}
365EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
366
367struct snd_soc_component
368*snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
369{
370 struct snd_soc_component *component;
371 struct snd_soc_component *found_component;
372
373 found_component = NULL;
374 for_each_component(component) {
375 if ((dev == component->dev) &&
376 (!driver_name ||
377 (driver_name == component->driver->name) ||
378 (strcmp(component->driver->name, driver_name) == 0))) {
379 found_component = component;
380 break;
381 }
382 }
383
384 return found_component;
385}
386EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
387
388struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
389 const char *driver_name)
390{
391 struct snd_soc_component *component;
392
393 mutex_lock(&client_mutex);
394 component = snd_soc_lookup_component_nolocked(dev, driver_name);
395 mutex_unlock(&client_mutex);
396
397 return component;
398}
399EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
400
401struct snd_soc_pcm_runtime
402*snd_soc_get_pcm_runtime(struct snd_soc_card *card,
403 struct snd_soc_dai_link *dai_link)
404{
405 struct snd_soc_pcm_runtime *rtd;
406
407 for_each_card_rtds(card, rtd) {
408 if (rtd->dai_link == dai_link)
409 return rtd;
410 }
411 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
412 return NULL;
413}
414EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
415
416/*
417 * Power down the audio subsystem pmdown_time msecs after close is called.
418 * This is to ensure there are no pops or clicks in between any music tracks
419 * due to DAPM power cycling.
420 */
421void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
422{
423 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
424 int playback = SNDRV_PCM_STREAM_PLAYBACK;
425
426 snd_soc_dpcm_mutex_lock(rtd);
427
428 dev_dbg(rtd->dev,
429 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
430 codec_dai->driver->playback.stream_name,
431 snd_soc_dai_stream_active(codec_dai, playback) ?
432 "active" : "inactive",
433 rtd->pop_wait ? "yes" : "no");
434
435 /* are we waiting on this codec DAI stream */
436 if (rtd->pop_wait == 1) {
437 rtd->pop_wait = 0;
438 snd_soc_dapm_stream_event(rtd, playback,
439 SND_SOC_DAPM_STREAM_STOP);
440 }
441
442 snd_soc_dpcm_mutex_unlock(rtd);
443}
444EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
445
446static void soc_release_rtd_dev(struct device *dev)
447{
448 /* "dev" means "rtd->dev" */
449 kfree(dev);
450}
451
452static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
453{
454 if (!rtd)
455 return;
456
457 list_del(&rtd->list);
458
459 if (delayed_work_pending(&rtd->delayed_work))
460 flush_delayed_work(&rtd->delayed_work);
461 snd_soc_pcm_component_free(rtd);
462
463 /*
464 * we don't need to call kfree() for rtd->dev
465 * see
466 * soc_release_rtd_dev()
467 *
468 * We don't need rtd->dev NULL check, because
469 * it is alloced *before* rtd.
470 * see
471 * soc_new_pcm_runtime()
472 *
473 * We don't need to mind freeing for rtd,
474 * because it was created from dev (= rtd->dev)
475 * see
476 * soc_new_pcm_runtime()
477 *
478 * rtd = devm_kzalloc(dev, ...);
479 * rtd->dev = dev
480 */
481 device_unregister(rtd->dev);
482}
483
484static void close_delayed_work(struct work_struct *work) {
485 struct snd_soc_pcm_runtime *rtd =
486 container_of(work, struct snd_soc_pcm_runtime,
487 delayed_work.work);
488
489 if (rtd->close_delayed_work_func)
490 rtd->close_delayed_work_func(rtd);
491}
492
493static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
494 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
495{
496 struct snd_soc_pcm_runtime *rtd;
497 struct snd_soc_component *component;
498 struct device *dev;
499 int ret;
500 int stream;
501
502 /*
503 * for rtd->dev
504 */
505 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
506 if (!dev)
507 return NULL;
508
509 dev->parent = card->dev;
510 dev->release = soc_release_rtd_dev;
511
512 dev_set_name(dev, "%s", dai_link->name);
513
514 ret = device_register(dev);
515 if (ret < 0) {
516 put_device(dev); /* soc_release_rtd_dev */
517 return NULL;
518 }
519
520 /*
521 * for rtd
522 */
523 rtd = devm_kzalloc(dev,
524 sizeof(*rtd) +
525 sizeof(component) * (dai_link->num_cpus +
526 dai_link->num_codecs +
527 dai_link->num_platforms),
528 GFP_KERNEL);
529 if (!rtd) {
530 device_unregister(dev);
531 return NULL;
532 }
533
534 rtd->dev = dev;
535 INIT_LIST_HEAD(&rtd->list);
536 for_each_pcm_streams(stream) {
537 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
538 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
539 }
540 dev_set_drvdata(dev, rtd);
541 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
542
543 /*
544 * for rtd->dais
545 */
546 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
547 sizeof(struct snd_soc_dai *),
548 GFP_KERNEL);
549 if (!rtd->dais)
550 goto free_rtd;
551
552 /*
553 * dais = [][][][][][][][][][][][][][][][][][]
554 * ^cpu_dais ^codec_dais
555 * |--- num_cpus ---|--- num_codecs --|
556 * see
557 * snd_soc_rtd_to_cpu()
558 * snd_soc_rtd_to_codec()
559 */
560 rtd->card = card;
561 rtd->dai_link = dai_link;
562 rtd->num = card->num_rtd++;
563 rtd->pmdown_time = pmdown_time; /* default power off timeout */
564
565 /* see for_each_card_rtds */
566 list_add_tail(&rtd->list, &card->rtd_list);
567
568 ret = device_add_groups(dev, soc_dev_attr_groups);
569 if (ret < 0)
570 goto free_rtd;
571
572 return rtd;
573
574free_rtd:
575 soc_free_pcm_runtime(rtd);
576 return NULL;
577}
578
579static void snd_soc_fill_dummy_dai(struct snd_soc_card *card)
580{
581 struct snd_soc_dai_link *dai_link;
582 int i;
583
584 /*
585 * COMP_DUMMY() creates size 0 array on dai_link.
586 * Fill it as dummy DAI in case of CPU/Codec here.
587 * Do nothing for Platform.
588 */
589 for_each_card_prelinks(card, i, dai_link) {
590 if (dai_link->num_cpus == 0 && dai_link->cpus) {
591 dai_link->num_cpus = 1;
592 dai_link->cpus = &snd_soc_dummy_dlc;
593 }
594 if (dai_link->num_codecs == 0 && dai_link->codecs) {
595 dai_link->num_codecs = 1;
596 dai_link->codecs = &snd_soc_dummy_dlc;
597 }
598 }
599}
600
601static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
602{
603 struct snd_soc_pcm_runtime *rtd;
604
605 for_each_card_rtds(card, rtd)
606 flush_delayed_work(&rtd->delayed_work);
607}
608
609#ifdef CONFIG_PM_SLEEP
610static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
611{
612 struct snd_soc_pcm_runtime *rtd;
613 struct snd_soc_dai *dai;
614 int playback = SNDRV_PCM_STREAM_PLAYBACK;
615 int i;
616
617 for_each_card_rtds(card, rtd) {
618
619 if (rtd->dai_link->ignore_suspend)
620 continue;
621
622 for_each_rtd_dais(rtd, i, dai) {
623 if (snd_soc_dai_stream_active(dai, playback))
624 snd_soc_dai_digital_mute(dai, mute, playback);
625 }
626 }
627}
628
629static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
630{
631 struct snd_soc_pcm_runtime *rtd;
632 int stream;
633
634 for_each_card_rtds(card, rtd) {
635
636 if (rtd->dai_link->ignore_suspend)
637 continue;
638
639 for_each_pcm_streams(stream)
640 snd_soc_dapm_stream_event(rtd, stream, event);
641 }
642}
643
644/* powers down audio subsystem for suspend */
645int snd_soc_suspend(struct device *dev)
646{
647 struct snd_soc_card *card = dev_get_drvdata(dev);
648 struct snd_soc_component *component;
649 struct snd_soc_pcm_runtime *rtd;
650 int i;
651
652 /* If the card is not initialized yet there is nothing to do */
653 if (!snd_soc_card_is_instantiated(card))
654 return 0;
655
656 /*
657 * Due to the resume being scheduled into a workqueue we could
658 * suspend before that's finished - wait for it to complete.
659 */
660 snd_power_wait(card->snd_card);
661
662 /* we're going to block userspace touching us until resume completes */
663 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
664
665 /* mute any active DACs */
666 soc_playback_digital_mute(card, 1);
667
668 /* suspend all pcms */
669 for_each_card_rtds(card, rtd) {
670 if (rtd->dai_link->ignore_suspend)
671 continue;
672
673 snd_pcm_suspend_all(rtd->pcm);
674 }
675
676 snd_soc_card_suspend_pre(card);
677
678 /* close any waiting streams */
679 snd_soc_flush_all_delayed_work(card);
680
681 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
682
683 /* Recheck all endpoints too, their state is affected by suspend */
684 dapm_mark_endpoints_dirty(card);
685 snd_soc_dapm_sync(&card->dapm);
686
687 /* suspend all COMPONENTs */
688 for_each_card_rtds(card, rtd) {
689
690 if (rtd->dai_link->ignore_suspend)
691 continue;
692
693 for_each_rtd_components(rtd, i, component) {
694 struct snd_soc_dapm_context *dapm =
695 snd_soc_component_get_dapm(component);
696
697 /*
698 * ignore if component was already suspended
699 */
700 if (snd_soc_component_is_suspended(component))
701 continue;
702
703 /*
704 * If there are paths active then the COMPONENT will be
705 * held with bias _ON and should not be suspended.
706 */
707 switch (snd_soc_dapm_get_bias_level(dapm)) {
708 case SND_SOC_BIAS_STANDBY:
709 /*
710 * If the COMPONENT is capable of idle
711 * bias off then being in STANDBY
712 * means it's doing something,
713 * otherwise fall through.
714 */
715 if (dapm->idle_bias_off) {
716 dev_dbg(component->dev,
717 "ASoC: idle_bias_off CODEC on over suspend\n");
718 break;
719 }
720 fallthrough;
721
722 case SND_SOC_BIAS_OFF:
723 snd_soc_component_suspend(component);
724 if (component->regmap)
725 regcache_mark_dirty(component->regmap);
726 /* deactivate pins to sleep state */
727 pinctrl_pm_select_sleep_state(component->dev);
728 break;
729 default:
730 dev_dbg(component->dev,
731 "ASoC: COMPONENT is on over suspend\n");
732 break;
733 }
734 }
735 }
736
737 snd_soc_card_suspend_post(card);
738
739 return 0;
740}
741EXPORT_SYMBOL_GPL(snd_soc_suspend);
742
743/*
744 * deferred resume work, so resume can complete before we finished
745 * setting our codec back up, which can be very slow on I2C
746 */
747static void soc_resume_deferred(struct work_struct *work)
748{
749 struct snd_soc_card *card =
750 container_of(work, struct snd_soc_card,
751 deferred_resume_work);
752 struct snd_soc_component *component;
753
754 /*
755 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
756 * so userspace apps are blocked from touching us
757 */
758
759 dev_dbg(card->dev, "ASoC: starting resume work\n");
760
761 /* Bring us up into D2 so that DAPM starts enabling things */
762 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
763
764 snd_soc_card_resume_pre(card);
765
766 for_each_card_components(card, component) {
767 if (snd_soc_component_is_suspended(component))
768 snd_soc_component_resume(component);
769 }
770
771 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
772
773 /* unmute any active DACs */
774 soc_playback_digital_mute(card, 0);
775
776 snd_soc_card_resume_post(card);
777
778 dev_dbg(card->dev, "ASoC: resume work completed\n");
779
780 /* Recheck all endpoints too, their state is affected by suspend */
781 dapm_mark_endpoints_dirty(card);
782 snd_soc_dapm_sync(&card->dapm);
783
784 /* userspace can access us now we are back as we were before */
785 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
786}
787
788/* powers up audio subsystem after a suspend */
789int snd_soc_resume(struct device *dev)
790{
791 struct snd_soc_card *card = dev_get_drvdata(dev);
792 struct snd_soc_component *component;
793
794 /* If the card is not initialized yet there is nothing to do */
795 if (!snd_soc_card_is_instantiated(card))
796 return 0;
797
798 /* activate pins from sleep state */
799 for_each_card_components(card, component)
800 if (snd_soc_component_active(component))
801 pinctrl_pm_select_default_state(component->dev);
802
803 dev_dbg(dev, "ASoC: Scheduling resume work\n");
804 if (!schedule_work(&card->deferred_resume_work))
805 dev_err(dev, "ASoC: resume work item may be lost\n");
806
807 return 0;
808}
809EXPORT_SYMBOL_GPL(snd_soc_resume);
810
811static void soc_resume_init(struct snd_soc_card *card)
812{
813 /* deferred resume work */
814 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
815}
816#else
817#define snd_soc_suspend NULL
818#define snd_soc_resume NULL
819static inline void soc_resume_init(struct snd_soc_card *card) { }
820#endif
821
822static struct device_node
823*soc_component_to_node(struct snd_soc_component *component)
824{
825 struct device_node *of_node;
826
827 of_node = component->dev->of_node;
828 if (!of_node && component->dev->parent)
829 of_node = component->dev->parent->of_node;
830
831 return of_node;
832}
833
834struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev,
835 const struct of_phandle_args *args)
836{
837 struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
838
839 if (!ret)
840 return NULL;
841
842 *ret = *args;
843
844 return ret;
845}
846EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
847
848static int snd_soc_is_matching_component(
849 const struct snd_soc_dai_link_component *dlc,
850 struct snd_soc_component *component)
851{
852 struct device_node *component_of_node;
853
854 if (!dlc)
855 return 0;
856
857 if (dlc->dai_args) {
858 struct snd_soc_dai *dai;
859
860 for_each_component_dais(component, dai)
861 if (snd_soc_is_matching_dai(dlc, dai))
862 return 1;
863 return 0;
864 }
865
866 component_of_node = soc_component_to_node(component);
867
868 if (dlc->of_node && component_of_node != dlc->of_node)
869 return 0;
870 if (dlc->name && strcmp(component->name, dlc->name))
871 return 0;
872
873 return 1;
874}
875
876static struct snd_soc_component *soc_find_component(
877 const struct snd_soc_dai_link_component *dlc)
878{
879 struct snd_soc_component *component;
880
881 lockdep_assert_held(&client_mutex);
882
883 /*
884 * NOTE
885 *
886 * It returns *1st* found component, but some driver
887 * has few components by same of_node/name
888 * ex)
889 * CPU component and generic DMAEngine component
890 */
891 for_each_component(component)
892 if (snd_soc_is_matching_component(dlc, component))
893 return component;
894
895 return NULL;
896}
897
898/**
899 * snd_soc_find_dai - Find a registered DAI
900 *
901 * @dlc: name of the DAI or the DAI driver and optional component info to match
902 *
903 * This function will search all registered components and their DAIs to
904 * find the DAI of the same name. The component's of_node and name
905 * should also match if being specified.
906 *
907 * Return: pointer of DAI, or NULL if not found.
908 */
909struct snd_soc_dai *snd_soc_find_dai(
910 const struct snd_soc_dai_link_component *dlc)
911{
912 struct snd_soc_component *component;
913 struct snd_soc_dai *dai;
914
915 lockdep_assert_held(&client_mutex);
916
917 /* Find CPU DAI from registered DAIs */
918 for_each_component(component)
919 if (snd_soc_is_matching_component(dlc, component))
920 for_each_component_dais(component, dai)
921 if (snd_soc_is_matching_dai(dlc, dai))
922 return dai;
923
924 return NULL;
925}
926EXPORT_SYMBOL_GPL(snd_soc_find_dai);
927
928struct snd_soc_dai *snd_soc_find_dai_with_mutex(
929 const struct snd_soc_dai_link_component *dlc)
930{
931 struct snd_soc_dai *dai;
932
933 mutex_lock(&client_mutex);
934 dai = snd_soc_find_dai(dlc);
935 mutex_unlock(&client_mutex);
936
937 return dai;
938}
939EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
940
941static int soc_dai_link_sanity_check(struct snd_soc_card *card,
942 struct snd_soc_dai_link *link)
943{
944 int i;
945 struct snd_soc_dai_link_component *dlc;
946
947 /* Codec check */
948 for_each_link_codecs(link, i, dlc) {
949 /*
950 * Codec must be specified by 1 of name or OF node,
951 * not both or neither.
952 */
953 if (snd_soc_dlc_component_is_invalid(dlc))
954 goto component_invalid;
955
956 if (snd_soc_dlc_component_is_empty(dlc))
957 goto component_empty;
958
959 /* Codec DAI name must be specified */
960 if (snd_soc_dlc_dai_is_empty(dlc))
961 goto dai_empty;
962
963 /*
964 * Defer card registration if codec component is not added to
965 * component list.
966 */
967 if (!soc_find_component(dlc))
968 goto component_not_found;
969 }
970
971 /* Platform check */
972 for_each_link_platforms(link, i, dlc) {
973 /*
974 * Platform may be specified by either name or OF node, but it
975 * can be left unspecified, then no components will be inserted
976 * in the rtdcom list
977 */
978 if (snd_soc_dlc_component_is_invalid(dlc))
979 goto component_invalid;
980
981 if (snd_soc_dlc_component_is_empty(dlc))
982 goto component_empty;
983
984 /*
985 * Defer card registration if platform component is not added to
986 * component list.
987 */
988 if (!soc_find_component(dlc))
989 goto component_not_found;
990 }
991
992 /* CPU check */
993 for_each_link_cpus(link, i, dlc) {
994 /*
995 * CPU device may be specified by either name or OF node, but
996 * can be left unspecified, and will be matched based on DAI
997 * name alone..
998 */
999 if (snd_soc_dlc_component_is_invalid(dlc))
1000 goto component_invalid;
1001
1002
1003 if (snd_soc_dlc_component_is_empty(dlc)) {
1004 /*
1005 * At least one of CPU DAI name or CPU device name/node must be specified
1006 */
1007 if (snd_soc_dlc_dai_is_empty(dlc))
1008 goto component_dai_empty;
1009 } else {
1010 /*
1011 * Defer card registration if Component is not added
1012 */
1013 if (!soc_find_component(dlc))
1014 goto component_not_found;
1015 }
1016 }
1017
1018 return 0;
1019
1020component_invalid:
1021 dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
1022 return -EINVAL;
1023
1024component_empty:
1025 dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
1026 return -EINVAL;
1027
1028component_not_found:
1029 dev_dbg(card->dev, "ASoC: Component %s not found for link %s\n", dlc->name, link->name);
1030 return -EPROBE_DEFER;
1031
1032dai_empty:
1033 dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
1034 return -EINVAL;
1035
1036component_dai_empty:
1037 dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
1038 return -EINVAL;
1039}
1040
1041#define MAX_DEFAULT_CH_MAP_SIZE 8
1042static struct snd_soc_dai_link_ch_map default_ch_map_sync[MAX_DEFAULT_CH_MAP_SIZE] = {
1043 { .cpu = 0, .codec = 0 },
1044 { .cpu = 1, .codec = 1 },
1045 { .cpu = 2, .codec = 2 },
1046 { .cpu = 3, .codec = 3 },
1047 { .cpu = 4, .codec = 4 },
1048 { .cpu = 5, .codec = 5 },
1049 { .cpu = 6, .codec = 6 },
1050 { .cpu = 7, .codec = 7 },
1051};
1052static struct snd_soc_dai_link_ch_map default_ch_map_1cpu[MAX_DEFAULT_CH_MAP_SIZE] = {
1053 { .cpu = 0, .codec = 0 },
1054 { .cpu = 0, .codec = 1 },
1055 { .cpu = 0, .codec = 2 },
1056 { .cpu = 0, .codec = 3 },
1057 { .cpu = 0, .codec = 4 },
1058 { .cpu = 0, .codec = 5 },
1059 { .cpu = 0, .codec = 6 },
1060 { .cpu = 0, .codec = 7 },
1061};
1062static struct snd_soc_dai_link_ch_map default_ch_map_1codec[MAX_DEFAULT_CH_MAP_SIZE] = {
1063 { .cpu = 0, .codec = 0 },
1064 { .cpu = 1, .codec = 0 },
1065 { .cpu = 2, .codec = 0 },
1066 { .cpu = 3, .codec = 0 },
1067 { .cpu = 4, .codec = 0 },
1068 { .cpu = 5, .codec = 0 },
1069 { .cpu = 6, .codec = 0 },
1070 { .cpu = 7, .codec = 0 },
1071};
1072static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card,
1073 struct snd_soc_dai_link *dai_link)
1074{
1075 struct snd_soc_dai_link_ch_map *ch_maps;
1076 int i;
1077
1078 /*
1079 * dai_link->ch_maps indicates how CPU/Codec are connected.
1080 * It will be a map seen from a larger number of DAI.
1081 * see
1082 * soc.h :: [dai_link->ch_maps Image sample]
1083 */
1084
1085 /* it should have ch_maps if connection was N:M */
1086 if (dai_link->num_cpus > 1 && dai_link->num_codecs > 1 &&
1087 dai_link->num_cpus != dai_link->num_codecs && !dai_link->ch_maps) {
1088 dev_err(card->dev, "need to have ch_maps when N:M connection (%s)",
1089 dai_link->name);
1090 return -EINVAL;
1091 }
1092
1093 /* do nothing if it has own maps */
1094 if (dai_link->ch_maps)
1095 goto sanity_check;
1096
1097 /* check default map size */
1098 if (dai_link->num_cpus > MAX_DEFAULT_CH_MAP_SIZE ||
1099 dai_link->num_codecs > MAX_DEFAULT_CH_MAP_SIZE) {
1100 dev_err(card->dev, "soc-core.c needs update default_connection_maps");
1101 return -EINVAL;
1102 }
1103
1104 /* Compensate missing map for ... */
1105 if (dai_link->num_cpus == dai_link->num_codecs)
1106 dai_link->ch_maps = default_ch_map_sync; /* for 1:1 or N:N */
1107 else if (dai_link->num_cpus < dai_link->num_codecs)
1108 dai_link->ch_maps = default_ch_map_1cpu; /* for 1:N */
1109 else
1110 dai_link->ch_maps = default_ch_map_1codec; /* for N:1 */
1111
1112sanity_check:
1113 dev_dbg(card->dev, "dai_link %s\n", dai_link->stream_name);
1114 for_each_link_ch_maps(dai_link, i, ch_maps) {
1115 if ((ch_maps->cpu >= dai_link->num_cpus) ||
1116 (ch_maps->codec >= dai_link->num_codecs)) {
1117 dev_err(card->dev,
1118 "unexpected dai_link->ch_maps[%d] index (cpu(%d/%d) codec(%d/%d))",
1119 i,
1120 ch_maps->cpu, dai_link->num_cpus,
1121 ch_maps->codec, dai_link->num_codecs);
1122 return -EINVAL;
1123 }
1124
1125 dev_dbg(card->dev, " [%d] cpu%d <-> codec%d\n",
1126 i, ch_maps->cpu, ch_maps->codec);
1127 }
1128
1129 return 0;
1130}
1131
1132/**
1133 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
1134 * @card: The ASoC card to which the pcm_runtime has
1135 * @rtd: The pcm_runtime to remove
1136 *
1137 * This function removes a pcm_runtime from the ASoC card.
1138 */
1139void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1140 struct snd_soc_pcm_runtime *rtd)
1141{
1142 lockdep_assert_held(&client_mutex);
1143
1144 /*
1145 * Notify the machine driver for extra destruction
1146 */
1147 snd_soc_card_remove_dai_link(card, rtd->dai_link);
1148
1149 soc_free_pcm_runtime(rtd);
1150}
1151EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
1152
1153/**
1154 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
1155 * @card: The ASoC card to which the pcm_runtime is added
1156 * @dai_link: The DAI link to find pcm_runtime
1157 *
1158 * This function adds a pcm_runtime ASoC card by using dai_link.
1159 *
1160 * Note: Topology can use this API to add pcm_runtime when probing the
1161 * topology component. And machine drivers can still define static
1162 * DAI links in dai_link array.
1163 */
1164static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1165 struct snd_soc_dai_link *dai_link)
1166{
1167 struct snd_soc_pcm_runtime *rtd;
1168 struct snd_soc_dai_link_component *codec, *platform, *cpu;
1169 struct snd_soc_component *component;
1170 int i, ret;
1171
1172 lockdep_assert_held(&client_mutex);
1173
1174 /*
1175 * Notify the machine driver for extra initialization
1176 */
1177 ret = snd_soc_card_add_dai_link(card, dai_link);
1178 if (ret < 0)
1179 return ret;
1180
1181 if (dai_link->ignore)
1182 return 0;
1183
1184 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1185
1186 ret = soc_dai_link_sanity_check(card, dai_link);
1187 if (ret < 0)
1188 return ret;
1189
1190 rtd = soc_new_pcm_runtime(card, dai_link);
1191 if (!rtd)
1192 return -ENOMEM;
1193
1194 for_each_link_cpus(dai_link, i, cpu) {
1195 snd_soc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1196 if (!snd_soc_rtd_to_cpu(rtd, i)) {
1197 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1198 cpu->dai_name);
1199 goto _err_defer;
1200 }
1201 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_cpu(rtd, i)->component);
1202 }
1203
1204 /* Find CODEC from registered CODECs */
1205 for_each_link_codecs(dai_link, i, codec) {
1206 snd_soc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1207 if (!snd_soc_rtd_to_codec(rtd, i)) {
1208 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1209 codec->dai_name);
1210 goto _err_defer;
1211 }
1212
1213 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_codec(rtd, i)->component);
1214 }
1215
1216 /* Find PLATFORM from registered PLATFORMs */
1217 for_each_link_platforms(dai_link, i, platform) {
1218 for_each_component(component) {
1219 if (!snd_soc_is_matching_component(platform, component))
1220 continue;
1221
1222 if (snd_soc_component_is_dummy(component) && component->num_dai)
1223 continue;
1224
1225 snd_soc_rtd_add_component(rtd, component);
1226 }
1227 }
1228
1229 return 0;
1230
1231_err_defer:
1232 snd_soc_remove_pcm_runtime(card, rtd);
1233 return -EPROBE_DEFER;
1234}
1235
1236int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1237 struct snd_soc_dai_link *dai_link,
1238 int num_dai_link)
1239{
1240 for (int i = 0; i < num_dai_link; i++) {
1241 int ret;
1242
1243 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1244 if (ret < 0)
1245 return ret;
1246
1247 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1248 if (ret < 0)
1249 return ret;
1250 }
1251
1252 return 0;
1253}
1254EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1255
1256static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1257{
1258 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1259 struct snd_soc_dai *dai, *not_used;
1260 u64 pos, possible_fmt;
1261 unsigned int mask = 0, dai_fmt = 0;
1262 int i, j, priority, pri, until;
1263
1264 /*
1265 * Get selectable format from each DAIs.
1266 *
1267 ****************************
1268 * NOTE
1269 * Using .auto_selectable_formats is not mandatory,
1270 * we can select format manually from Sound Card.
1271 * When use it, driver should list well tested format only.
1272 ****************************
1273 *
1274 * ex)
1275 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1276 * (A) (B) (C)
1277 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1278 * DAI1 : { 0xF000, 0x0F00 };
1279 * (X) (Y)
1280 *
1281 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1282 * Here is dev_dbg() message and comments
1283 *
1284 * priority = 1
1285 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1286 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1287 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1288 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1289 * priority = 2
1290 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1291 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1292 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1293 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1294 * priority = 3
1295 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1296 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1297 * found auto selected format: 0000000000000F00
1298 */
1299 until = snd_soc_dai_get_fmt_max_priority(rtd);
1300 for (priority = 1; priority <= until; priority++) {
1301 for_each_rtd_dais(rtd, j, not_used) {
1302
1303 possible_fmt = ULLONG_MAX;
1304 for_each_rtd_dais(rtd, i, dai) {
1305 u64 fmt = 0;
1306
1307 pri = (j >= i) ? priority : priority - 1;
1308 fmt = snd_soc_dai_get_fmt(dai, pri);
1309 possible_fmt &= fmt;
1310 }
1311 if (possible_fmt)
1312 goto found;
1313 }
1314 }
1315 /* Not Found */
1316 return;
1317found:
1318 /*
1319 * convert POSSIBLE_DAIFMT to DAIFMT
1320 *
1321 * Some basic/default settings on each is defined as 0.
1322 * see
1323 * SND_SOC_DAIFMT_NB_NF
1324 * SND_SOC_DAIFMT_GATED
1325 *
1326 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1327 * these value, and will be overwrite to auto selected value.
1328 *
1329 * To avoid such issue, loop from 63 to 0 here.
1330 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1331 * Basic/Default settings of each part and above are defined
1332 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1333 */
1334 for (i = 63; i >= 0; i--) {
1335 pos = 1ULL << i;
1336 switch (possible_fmt & pos) {
1337 /*
1338 * for format
1339 */
1340 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1341 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1342 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1343 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1344 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1345 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1346 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1347 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1348 break;
1349 /*
1350 * for clock
1351 */
1352 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1353 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1354 break;
1355 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1356 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1357 break;
1358 /*
1359 * for clock invert
1360 */
1361 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1362 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1363 break;
1364 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1365 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1366 break;
1367 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1368 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1369 break;
1370 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1371 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1372 break;
1373 /*
1374 * for clock provider / consumer
1375 */
1376 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1377 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1378 break;
1379 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1380 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1381 break;
1382 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1383 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1384 break;
1385 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1386 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1387 break;
1388 }
1389 }
1390
1391 /*
1392 * Some driver might have very complex limitation.
1393 * In such case, user want to auto-select non-limitation part,
1394 * and want to manually specify complex part.
1395 *
1396 * Or for example, if both CPU and Codec can be clock provider,
1397 * but because of its quality, user want to specify it manually.
1398 *
1399 * Use manually specified settings if sound card did.
1400 */
1401 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1402 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1403 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1404 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1405 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1406 mask |= SND_SOC_DAIFMT_INV_MASK;
1407 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1408 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1409
1410 dai_link->dai_fmt |= (dai_fmt & mask);
1411}
1412
1413/**
1414 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1415 * @rtd: The runtime for which the DAI link format should be changed
1416 * @dai_fmt: The new DAI link format
1417 *
1418 * This function updates the DAI link format for all DAIs connected to the DAI
1419 * link for the specified runtime.
1420 *
1421 * Note: For setups with a static format set the dai_fmt field in the
1422 * corresponding snd_dai_link struct instead of using this function.
1423 *
1424 * Returns 0 on success, otherwise a negative error code.
1425 */
1426int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1427 unsigned int dai_fmt)
1428{
1429 struct snd_soc_dai *cpu_dai;
1430 struct snd_soc_dai *codec_dai;
1431 unsigned int i;
1432 int ret;
1433
1434 if (!dai_fmt)
1435 return 0;
1436
1437 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1438 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1439 if (ret != 0 && ret != -ENOTSUPP)
1440 return ret;
1441 }
1442
1443 /* Flip the polarity for the "CPU" end of link */
1444 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1445
1446 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1447 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1448 if (ret != 0 && ret != -ENOTSUPP)
1449 return ret;
1450 }
1451
1452 return 0;
1453}
1454EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1455
1456static int soc_init_pcm_runtime(struct snd_soc_card *card,
1457 struct snd_soc_pcm_runtime *rtd)
1458{
1459 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1460 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
1461 struct snd_soc_component *component;
1462 int ret, num, i;
1463
1464 /* do machine specific initialization */
1465 ret = snd_soc_link_init(rtd);
1466 if (ret < 0)
1467 return ret;
1468
1469 snd_soc_runtime_get_dai_fmt(rtd);
1470 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1471 if (ret)
1472 goto err;
1473
1474 /* add DPCM sysfs entries */
1475 soc_dpcm_debugfs_add(rtd);
1476
1477 num = rtd->num;
1478
1479 /*
1480 * most drivers will register their PCMs using DAI link ordering but
1481 * topology based drivers can use the DAI link id field to set PCM
1482 * device number and then use rtd + a base offset of the BEs.
1483 */
1484 for_each_rtd_components(rtd, i, component) {
1485 if (!component->driver->use_dai_pcm_id)
1486 continue;
1487
1488 if (rtd->dai_link->no_pcm)
1489 num += component->driver->be_pcm_base;
1490 else
1491 num = rtd->dai_link->id;
1492 }
1493
1494 /* create compress_device if possible */
1495 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1496 if (ret != -ENOTSUPP)
1497 goto err;
1498
1499 /* create the pcm */
1500 ret = soc_new_pcm(rtd, num);
1501 if (ret < 0) {
1502 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1503 dai_link->stream_name, ret);
1504 goto err;
1505 }
1506
1507 ret = snd_soc_pcm_dai_new(rtd);
1508 if (ret < 0)
1509 goto err;
1510
1511 rtd->initialized = true;
1512
1513 return 0;
1514err:
1515 snd_soc_link_exit(rtd);
1516 return ret;
1517}
1518
1519static void soc_set_name_prefix(struct snd_soc_card *card,
1520 struct snd_soc_component *component)
1521{
1522 struct device_node *of_node = soc_component_to_node(component);
1523 const char *str;
1524 int ret, i;
1525
1526 for (i = 0; i < card->num_configs; i++) {
1527 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1528
1529 if (snd_soc_is_matching_component(&map->dlc, component) &&
1530 map->name_prefix) {
1531 component->name_prefix = map->name_prefix;
1532 return;
1533 }
1534 }
1535
1536 /*
1537 * If there is no configuration table or no match in the table,
1538 * check if a prefix is provided in the node
1539 */
1540 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1541 if (ret < 0)
1542 return;
1543
1544 component->name_prefix = str;
1545}
1546
1547static void soc_remove_component(struct snd_soc_component *component,
1548 int probed)
1549{
1550
1551 if (!component->card)
1552 return;
1553
1554 if (probed)
1555 snd_soc_component_remove(component);
1556
1557 list_del_init(&component->card_list);
1558 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1559 soc_cleanup_component_debugfs(component);
1560 component->card = NULL;
1561 snd_soc_component_module_put_when_remove(component);
1562}
1563
1564static int soc_probe_component(struct snd_soc_card *card,
1565 struct snd_soc_component *component)
1566{
1567 struct snd_soc_dapm_context *dapm =
1568 snd_soc_component_get_dapm(component);
1569 struct snd_soc_dai *dai;
1570 int probed = 0;
1571 int ret;
1572
1573 if (snd_soc_component_is_dummy(component))
1574 return 0;
1575
1576 if (component->card) {
1577 if (component->card != card) {
1578 dev_err(component->dev,
1579 "Trying to bind component \"%s\" to card \"%s\" but is already bound to card \"%s\"\n",
1580 component->name, card->name, component->card->name);
1581 return -ENODEV;
1582 }
1583 return 0;
1584 }
1585
1586 ret = snd_soc_component_module_get_when_probe(component);
1587 if (ret < 0)
1588 return ret;
1589
1590 component->card = card;
1591 soc_set_name_prefix(card, component);
1592
1593 soc_init_component_debugfs(component);
1594
1595 snd_soc_dapm_init(dapm, card, component);
1596
1597 ret = snd_soc_dapm_new_controls(dapm,
1598 component->driver->dapm_widgets,
1599 component->driver->num_dapm_widgets);
1600
1601 if (ret != 0) {
1602 dev_err(component->dev,
1603 "Failed to create new controls %d\n", ret);
1604 goto err_probe;
1605 }
1606
1607 for_each_component_dais(component, dai) {
1608 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1609 if (ret != 0) {
1610 dev_err(component->dev,
1611 "Failed to create DAI widgets %d\n", ret);
1612 goto err_probe;
1613 }
1614 }
1615
1616 ret = snd_soc_component_probe(component);
1617 if (ret < 0)
1618 goto err_probe;
1619
1620 WARN(dapm->idle_bias_off &&
1621 dapm->bias_level != SND_SOC_BIAS_OFF,
1622 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1623 component->name);
1624 probed = 1;
1625
1626 /*
1627 * machine specific init
1628 * see
1629 * snd_soc_component_set_aux()
1630 */
1631 ret = snd_soc_component_init(component);
1632 if (ret < 0)
1633 goto err_probe;
1634
1635 ret = snd_soc_add_component_controls(component,
1636 component->driver->controls,
1637 component->driver->num_controls);
1638 if (ret < 0)
1639 goto err_probe;
1640
1641 ret = snd_soc_dapm_add_routes(dapm,
1642 component->driver->dapm_routes,
1643 component->driver->num_dapm_routes);
1644 if (ret < 0) {
1645 if (card->disable_route_checks) {
1646 dev_info(card->dev,
1647 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1648 __func__);
1649 } else {
1650 dev_err(card->dev,
1651 "%s: snd_soc_dapm_add_routes failed: %d\n",
1652 __func__, ret);
1653 goto err_probe;
1654 }
1655 }
1656
1657 /* see for_each_card_components */
1658 list_add(&component->card_list, &card->component_dev_list);
1659
1660err_probe:
1661 if (ret < 0)
1662 soc_remove_component(component, probed);
1663
1664 return ret;
1665}
1666
1667static void soc_remove_link_dais(struct snd_soc_card *card)
1668{
1669 struct snd_soc_pcm_runtime *rtd;
1670 int order;
1671
1672 for_each_comp_order(order) {
1673 for_each_card_rtds(card, rtd) {
1674 /* remove all rtd connected DAIs in good order */
1675 snd_soc_pcm_dai_remove(rtd, order);
1676 }
1677 }
1678}
1679
1680static int soc_probe_link_dais(struct snd_soc_card *card)
1681{
1682 struct snd_soc_pcm_runtime *rtd;
1683 int order, ret;
1684
1685 for_each_comp_order(order) {
1686 for_each_card_rtds(card, rtd) {
1687 /* probe all rtd connected DAIs in good order */
1688 ret = snd_soc_pcm_dai_probe(rtd, order);
1689 if (ret)
1690 return ret;
1691 }
1692 }
1693
1694 return 0;
1695}
1696
1697static void soc_remove_link_components(struct snd_soc_card *card)
1698{
1699 struct snd_soc_component *component;
1700 struct snd_soc_pcm_runtime *rtd;
1701 int i, order;
1702
1703 for_each_comp_order(order) {
1704 for_each_card_rtds(card, rtd) {
1705 for_each_rtd_components(rtd, i, component) {
1706 if (component->driver->remove_order != order)
1707 continue;
1708
1709 soc_remove_component(component, 1);
1710 }
1711 }
1712 }
1713}
1714
1715static int soc_probe_link_components(struct snd_soc_card *card)
1716{
1717 struct snd_soc_component *component;
1718 struct snd_soc_pcm_runtime *rtd;
1719 int i, ret, order;
1720
1721 for_each_comp_order(order) {
1722 for_each_card_rtds(card, rtd) {
1723 for_each_rtd_components(rtd, i, component) {
1724 if (component->driver->probe_order != order)
1725 continue;
1726
1727 ret = soc_probe_component(card, component);
1728 if (ret < 0)
1729 return ret;
1730 }
1731 }
1732 }
1733
1734 return 0;
1735}
1736
1737static void soc_unbind_aux_dev(struct snd_soc_card *card)
1738{
1739 struct snd_soc_component *component, *_component;
1740
1741 for_each_card_auxs_safe(card, component, _component) {
1742 /* for snd_soc_component_init() */
1743 snd_soc_component_set_aux(component, NULL);
1744 list_del(&component->card_aux_list);
1745 }
1746}
1747
1748static int soc_bind_aux_dev(struct snd_soc_card *card)
1749{
1750 struct snd_soc_component *component;
1751 struct snd_soc_aux_dev *aux;
1752 int i;
1753
1754 for_each_card_pre_auxs(card, i, aux) {
1755 /* codecs, usually analog devices */
1756 component = soc_find_component(&aux->dlc);
1757 if (!component)
1758 return -EPROBE_DEFER;
1759
1760 /* for snd_soc_component_init() */
1761 snd_soc_component_set_aux(component, aux);
1762 /* see for_each_card_auxs */
1763 list_add(&component->card_aux_list, &card->aux_comp_list);
1764 }
1765 return 0;
1766}
1767
1768static int soc_probe_aux_devices(struct snd_soc_card *card)
1769{
1770 struct snd_soc_component *component;
1771 int order;
1772 int ret;
1773
1774 for_each_comp_order(order) {
1775 for_each_card_auxs(card, component) {
1776 if (component->driver->probe_order != order)
1777 continue;
1778
1779 ret = soc_probe_component(card, component);
1780 if (ret < 0)
1781 return ret;
1782 }
1783 }
1784
1785 return 0;
1786}
1787
1788static void soc_remove_aux_devices(struct snd_soc_card *card)
1789{
1790 struct snd_soc_component *comp, *_comp;
1791 int order;
1792
1793 for_each_comp_order(order) {
1794 for_each_card_auxs_safe(card, comp, _comp) {
1795 if (comp->driver->remove_order == order)
1796 soc_remove_component(comp, 1);
1797 }
1798 }
1799}
1800
1801#ifdef CONFIG_DMI
1802/*
1803 * If a DMI filed contain strings in this blacklist (e.g.
1804 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1805 * as invalid and dropped when setting the card long name from DMI info.
1806 */
1807static const char * const dmi_blacklist[] = {
1808 "To be filled by OEM",
1809 "TBD by OEM",
1810 "Default String",
1811 "Board Manufacturer",
1812 "Board Vendor Name",
1813 "Board Product Name",
1814 NULL, /* terminator */
1815};
1816
1817/*
1818 * Trim special characters, and replace '-' with '_' since '-' is used to
1819 * separate different DMI fields in the card long name. Only number and
1820 * alphabet characters and a few separator characters are kept.
1821 */
1822static void cleanup_dmi_name(char *name)
1823{
1824 int i, j = 0;
1825
1826 for (i = 0; name[i]; i++) {
1827 if (isalnum(name[i]) || (name[i] == '.')
1828 || (name[i] == '_'))
1829 name[j++] = name[i];
1830 else if (name[i] == '-')
1831 name[j++] = '_';
1832 }
1833
1834 name[j] = '\0';
1835}
1836
1837/*
1838 * Check if a DMI field is valid, i.e. not containing any string
1839 * in the black list.
1840 */
1841static int is_dmi_valid(const char *field)
1842{
1843 int i = 0;
1844
1845 while (dmi_blacklist[i]) {
1846 if (strstr(field, dmi_blacklist[i]))
1847 return 0;
1848 i++;
1849 }
1850
1851 return 1;
1852}
1853
1854/*
1855 * Append a string to card->dmi_longname with character cleanups.
1856 */
1857static void append_dmi_string(struct snd_soc_card *card, const char *str)
1858{
1859 char *dst = card->dmi_longname;
1860 size_t dst_len = sizeof(card->dmi_longname);
1861 size_t len;
1862
1863 len = strlen(dst);
1864 snprintf(dst + len, dst_len - len, "-%s", str);
1865
1866 len++; /* skip the separator "-" */
1867 if (len < dst_len)
1868 cleanup_dmi_name(dst + len);
1869}
1870
1871/**
1872 * snd_soc_set_dmi_name() - Register DMI names to card
1873 * @card: The card to register DMI names
1874 * @flavour: The flavour "differentiator" for the card amongst its peers.
1875 *
1876 * An Intel machine driver may be used by many different devices but are
1877 * difficult for userspace to differentiate, since machine drivers usually
1878 * use their own name as the card short name and leave the card long name
1879 * blank. To differentiate such devices and fix bugs due to lack of
1880 * device-specific configurations, this function allows DMI info to be used
1881 * as the sound card long name, in the format of
1882 * "vendor-product-version-board"
1883 * (Character '-' is used to separate different DMI fields here).
1884 * This will help the user space to load the device-specific Use Case Manager
1885 * (UCM) configurations for the card.
1886 *
1887 * Possible card long names may be:
1888 * DellInc.-XPS139343-01-0310JH
1889 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1890 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1891 *
1892 * This function also supports flavoring the card longname to provide
1893 * the extra differentiation, like "vendor-product-version-board-flavor".
1894 *
1895 * We only keep number and alphabet characters and a few separator characters
1896 * in the card long name since UCM in the user space uses the card long names
1897 * as card configuration directory names and AudoConf cannot support special
1898 * characters like SPACE.
1899 *
1900 * Returns 0 on success, otherwise a negative error code.
1901 */
1902int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1903{
1904 const char *vendor, *product, *board;
1905
1906 if (card->long_name)
1907 return 0; /* long name already set by driver or from DMI */
1908
1909 if (!dmi_available)
1910 return 0;
1911
1912 /* make up dmi long name as: vendor-product-version-board */
1913 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1914 if (!vendor || !is_dmi_valid(vendor)) {
1915 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1916 return 0;
1917 }
1918
1919 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1920 cleanup_dmi_name(card->dmi_longname);
1921
1922 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1923 if (product && is_dmi_valid(product)) {
1924 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1925
1926 append_dmi_string(card, product);
1927
1928 /*
1929 * some vendors like Lenovo may only put a self-explanatory
1930 * name in the product version field
1931 */
1932 if (product_version && is_dmi_valid(product_version))
1933 append_dmi_string(card, product_version);
1934 }
1935
1936 board = dmi_get_system_info(DMI_BOARD_NAME);
1937 if (board && is_dmi_valid(board)) {
1938 if (!product || strcasecmp(board, product))
1939 append_dmi_string(card, board);
1940 } else if (!product) {
1941 /* fall back to using legacy name */
1942 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1943 return 0;
1944 }
1945
1946 /* Add flavour to dmi long name */
1947 if (flavour)
1948 append_dmi_string(card, flavour);
1949
1950 /* set the card long name */
1951 card->long_name = card->dmi_longname;
1952
1953 return 0;
1954}
1955EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1956#endif /* CONFIG_DMI */
1957
1958static void soc_check_tplg_fes(struct snd_soc_card *card)
1959{
1960 struct snd_soc_component *component;
1961 const struct snd_soc_component_driver *comp_drv;
1962 struct snd_soc_dai_link *dai_link;
1963 int i;
1964
1965 for_each_component(component) {
1966
1967 /* does this component override BEs ? */
1968 if (!component->driver->ignore_machine)
1969 continue;
1970
1971 /* for this machine ? */
1972 if (!strcmp(component->driver->ignore_machine,
1973 card->dev->driver->name))
1974 goto match;
1975 if (strcmp(component->driver->ignore_machine,
1976 dev_name(card->dev)))
1977 continue;
1978match:
1979 /* machine matches, so override the rtd data */
1980 for_each_card_prelinks(card, i, dai_link) {
1981
1982 /* ignore this FE */
1983 if (dai_link->dynamic) {
1984 dai_link->ignore = true;
1985 continue;
1986 }
1987
1988 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1989 card->dai_link[i].name);
1990
1991 /* override platform component */
1992 if (!dai_link->platforms) {
1993 dev_err(card->dev, "init platform error");
1994 continue;
1995 }
1996
1997 if (component->dev->of_node)
1998 dai_link->platforms->of_node = component->dev->of_node;
1999 else
2000 dai_link->platforms->name = component->name;
2001
2002 /* convert non BE into BE */
2003 if (!dai_link->no_pcm) {
2004 dai_link->no_pcm = 1;
2005
2006 if (dai_link->dpcm_playback)
2007 dev_warn(card->dev,
2008 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
2009 dai_link->name);
2010 if (dai_link->dpcm_capture)
2011 dev_warn(card->dev,
2012 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
2013 dai_link->name);
2014
2015 /* convert normal link into DPCM one */
2016 if (!(dai_link->dpcm_playback ||
2017 dai_link->dpcm_capture)) {
2018 dai_link->dpcm_playback = !dai_link->capture_only;
2019 dai_link->dpcm_capture = !dai_link->playback_only;
2020 }
2021 }
2022
2023 /*
2024 * override any BE fixups
2025 * see
2026 * snd_soc_link_be_hw_params_fixup()
2027 */
2028 dai_link->be_hw_params_fixup =
2029 component->driver->be_hw_params_fixup;
2030
2031 /*
2032 * most BE links don't set stream name, so set it to
2033 * dai link name if it's NULL to help bind widgets.
2034 */
2035 if (!dai_link->stream_name)
2036 dai_link->stream_name = dai_link->name;
2037 }
2038
2039 /* Inform userspace we are using alternate topology */
2040 if (component->driver->topology_name_prefix) {
2041
2042 /* topology shortname created? */
2043 if (!card->topology_shortname_created) {
2044 comp_drv = component->driver;
2045
2046 snprintf(card->topology_shortname, 32, "%s-%s",
2047 comp_drv->topology_name_prefix,
2048 card->name);
2049 card->topology_shortname_created = true;
2050 }
2051
2052 /* use topology shortname */
2053 card->name = card->topology_shortname;
2054 }
2055 }
2056}
2057
2058#define soc_setup_card_name(card, name, name1, name2) \
2059 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
2060static void __soc_setup_card_name(struct snd_soc_card *card,
2061 char *name, int len,
2062 const char *name1, const char *name2)
2063{
2064 const char *src = name1 ? name1 : name2;
2065 int i;
2066
2067 snprintf(name, len, "%s", src);
2068
2069 if (name != card->snd_card->driver)
2070 return;
2071
2072 /*
2073 * Name normalization (driver field)
2074 *
2075 * The driver name is somewhat special, as it's used as a key for
2076 * searches in the user-space.
2077 *
2078 * ex)
2079 * "abcd??efg" -> "abcd__efg"
2080 */
2081 for (i = 0; i < len; i++) {
2082 switch (name[i]) {
2083 case '_':
2084 case '-':
2085 case '\0':
2086 break;
2087 default:
2088 if (!isalnum(name[i]))
2089 name[i] = '_';
2090 break;
2091 }
2092 }
2093
2094 /*
2095 * The driver field should contain a valid string from the user view.
2096 * The wrapping usually does not work so well here. Set a smaller string
2097 * in the specific ASoC driver.
2098 */
2099 if (strlen(src) > len - 1)
2100 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2101}
2102
2103static void soc_cleanup_card_resources(struct snd_soc_card *card)
2104{
2105 struct snd_soc_pcm_runtime *rtd, *n;
2106
2107 if (card->snd_card)
2108 snd_card_disconnect_sync(card->snd_card);
2109
2110 snd_soc_dapm_shutdown(card);
2111
2112 /* release machine specific resources */
2113 for_each_card_rtds(card, rtd)
2114 if (rtd->initialized)
2115 snd_soc_link_exit(rtd);
2116 /* remove and free each DAI */
2117 soc_remove_link_dais(card);
2118 soc_remove_link_components(card);
2119
2120 for_each_card_rtds_safe(card, rtd, n)
2121 snd_soc_remove_pcm_runtime(card, rtd);
2122
2123 /* remove auxiliary devices */
2124 soc_remove_aux_devices(card);
2125 soc_unbind_aux_dev(card);
2126
2127 snd_soc_dapm_free(&card->dapm);
2128 soc_cleanup_card_debugfs(card);
2129
2130 /* remove the card */
2131 snd_soc_card_remove(card);
2132
2133 if (card->snd_card) {
2134 snd_card_free(card->snd_card);
2135 card->snd_card = NULL;
2136 }
2137}
2138
2139static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2140{
2141 if (snd_soc_card_is_instantiated(card)) {
2142 card->instantiated = false;
2143 snd_soc_flush_all_delayed_work(card);
2144
2145 soc_cleanup_card_resources(card);
2146 if (!unregister)
2147 list_add(&card->list, &unbind_card_list);
2148 } else {
2149 if (unregister)
2150 list_del(&card->list);
2151 }
2152}
2153
2154static int snd_soc_bind_card(struct snd_soc_card *card)
2155{
2156 struct snd_soc_pcm_runtime *rtd;
2157 struct snd_soc_component *component;
2158 int ret;
2159
2160 mutex_lock(&client_mutex);
2161 snd_soc_card_mutex_lock_root(card);
2162
2163 snd_soc_fill_dummy_dai(card);
2164
2165 snd_soc_dapm_init(&card->dapm, card, NULL);
2166
2167 /* check whether any platform is ignore machine FE and using topology */
2168 soc_check_tplg_fes(card);
2169
2170 /* bind aux_devs too */
2171 ret = soc_bind_aux_dev(card);
2172 if (ret < 0)
2173 goto probe_end;
2174
2175 /* add predefined DAI links to the list */
2176 card->num_rtd = 0;
2177 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2178 if (ret < 0)
2179 goto probe_end;
2180
2181 /* card bind complete so register a sound card */
2182 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2183 card->owner, 0, &card->snd_card);
2184 if (ret < 0) {
2185 dev_err(card->dev,
2186 "ASoC: can't create sound card for card %s: %d\n",
2187 card->name, ret);
2188 goto probe_end;
2189 }
2190
2191 soc_init_card_debugfs(card);
2192
2193 soc_resume_init(card);
2194
2195 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2196 card->num_dapm_widgets);
2197 if (ret < 0)
2198 goto probe_end;
2199
2200 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2201 card->num_of_dapm_widgets);
2202 if (ret < 0)
2203 goto probe_end;
2204
2205 /* initialise the sound card only once */
2206 ret = snd_soc_card_probe(card);
2207 if (ret < 0)
2208 goto probe_end;
2209
2210 /* probe all components used by DAI links on this card */
2211 ret = soc_probe_link_components(card);
2212 if (ret < 0) {
2213 if (ret != -EPROBE_DEFER) {
2214 dev_err(card->dev,
2215 "ASoC: failed to instantiate card %d\n", ret);
2216 }
2217 goto probe_end;
2218 }
2219
2220 /* probe auxiliary components */
2221 ret = soc_probe_aux_devices(card);
2222 if (ret < 0) {
2223 dev_err(card->dev,
2224 "ASoC: failed to probe aux component %d\n", ret);
2225 goto probe_end;
2226 }
2227
2228 /* probe all DAI links on this card */
2229 ret = soc_probe_link_dais(card);
2230 if (ret < 0) {
2231 dev_err(card->dev,
2232 "ASoC: failed to instantiate card %d\n", ret);
2233 goto probe_end;
2234 }
2235
2236 for_each_card_rtds(card, rtd) {
2237 ret = soc_init_pcm_runtime(card, rtd);
2238 if (ret < 0)
2239 goto probe_end;
2240 }
2241
2242 snd_soc_dapm_link_dai_widgets(card);
2243 snd_soc_dapm_connect_dai_link_widgets(card);
2244
2245 ret = snd_soc_add_card_controls(card, card->controls,
2246 card->num_controls);
2247 if (ret < 0)
2248 goto probe_end;
2249
2250 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2251 card->num_dapm_routes);
2252 if (ret < 0) {
2253 if (card->disable_route_checks) {
2254 dev_info(card->dev,
2255 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2256 __func__);
2257 } else {
2258 dev_err(card->dev,
2259 "%s: snd_soc_dapm_add_routes failed: %d\n",
2260 __func__, ret);
2261 goto probe_end;
2262 }
2263 }
2264
2265 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2266 card->num_of_dapm_routes);
2267 if (ret < 0)
2268 goto probe_end;
2269
2270 /* try to set some sane longname if DMI is available */
2271 snd_soc_set_dmi_name(card, NULL);
2272
2273 soc_setup_card_name(card, card->snd_card->shortname,
2274 card->name, NULL);
2275 soc_setup_card_name(card, card->snd_card->longname,
2276 card->long_name, card->name);
2277 soc_setup_card_name(card, card->snd_card->driver,
2278 card->driver_name, card->name);
2279
2280 if (card->components) {
2281 /* the current implementation of snd_component_add() accepts */
2282 /* multiple components in the string separated by space, */
2283 /* but the string collision (identical string) check might */
2284 /* not work correctly */
2285 ret = snd_component_add(card->snd_card, card->components);
2286 if (ret < 0) {
2287 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2288 card->name, ret);
2289 goto probe_end;
2290 }
2291 }
2292
2293 ret = snd_soc_card_late_probe(card);
2294 if (ret < 0)
2295 goto probe_end;
2296
2297 snd_soc_dapm_new_widgets(card);
2298 snd_soc_card_fixup_controls(card);
2299
2300 ret = snd_card_register(card->snd_card);
2301 if (ret < 0) {
2302 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2303 ret);
2304 goto probe_end;
2305 }
2306
2307 card->instantiated = 1;
2308 dapm_mark_endpoints_dirty(card);
2309 snd_soc_dapm_sync(&card->dapm);
2310
2311 /* deactivate pins to sleep state */
2312 for_each_card_components(card, component)
2313 if (!snd_soc_component_active(component))
2314 pinctrl_pm_select_sleep_state(component->dev);
2315
2316probe_end:
2317 if (ret < 0)
2318 soc_cleanup_card_resources(card);
2319
2320 snd_soc_card_mutex_unlock(card);
2321 mutex_unlock(&client_mutex);
2322
2323 return ret;
2324}
2325
2326/* probes a new socdev */
2327static int soc_probe(struct platform_device *pdev)
2328{
2329 struct snd_soc_card *card = platform_get_drvdata(pdev);
2330
2331 /*
2332 * no card, so machine driver should be registering card
2333 * we should not be here in that case so ret error
2334 */
2335 if (!card)
2336 return -EINVAL;
2337
2338 dev_warn(&pdev->dev,
2339 "ASoC: machine %s should use snd_soc_register_card()\n",
2340 card->name);
2341
2342 /* Bodge while we unpick instantiation */
2343 card->dev = &pdev->dev;
2344
2345 return devm_snd_soc_register_card(&pdev->dev, card);
2346}
2347
2348int snd_soc_poweroff(struct device *dev)
2349{
2350 struct snd_soc_card *card = dev_get_drvdata(dev);
2351 struct snd_soc_component *component;
2352
2353 if (!snd_soc_card_is_instantiated(card))
2354 return 0;
2355
2356 /*
2357 * Flush out pmdown_time work - we actually do want to run it
2358 * now, we're shutting down so no imminent restart.
2359 */
2360 snd_soc_flush_all_delayed_work(card);
2361
2362 snd_soc_dapm_shutdown(card);
2363
2364 /* deactivate pins to sleep state */
2365 for_each_card_components(card, component)
2366 pinctrl_pm_select_sleep_state(component->dev);
2367
2368 return 0;
2369}
2370EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2371
2372const struct dev_pm_ops snd_soc_pm_ops = {
2373 .suspend = snd_soc_suspend,
2374 .resume = snd_soc_resume,
2375 .freeze = snd_soc_suspend,
2376 .thaw = snd_soc_resume,
2377 .poweroff = snd_soc_poweroff,
2378 .restore = snd_soc_resume,
2379};
2380EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2381
2382/* ASoC platform driver */
2383static struct platform_driver soc_driver = {
2384 .driver = {
2385 .name = "soc-audio",
2386 .pm = &snd_soc_pm_ops,
2387 },
2388 .probe = soc_probe,
2389};
2390
2391/**
2392 * snd_soc_cnew - create new control
2393 * @_template: control template
2394 * @data: control private data
2395 * @long_name: control long name
2396 * @prefix: control name prefix
2397 *
2398 * Create a new mixer control from a template control.
2399 *
2400 * Returns 0 for success, else error.
2401 */
2402struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2403 void *data, const char *long_name,
2404 const char *prefix)
2405{
2406 struct snd_kcontrol_new template;
2407 struct snd_kcontrol *kcontrol;
2408 char *name = NULL;
2409
2410 memcpy(&template, _template, sizeof(template));
2411 template.index = 0;
2412
2413 if (!long_name)
2414 long_name = template.name;
2415
2416 if (prefix) {
2417 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2418 if (!name)
2419 return NULL;
2420
2421 template.name = name;
2422 } else {
2423 template.name = long_name;
2424 }
2425
2426 kcontrol = snd_ctl_new1(&template, data);
2427
2428 kfree(name);
2429
2430 return kcontrol;
2431}
2432EXPORT_SYMBOL_GPL(snd_soc_cnew);
2433
2434static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2435 const struct snd_kcontrol_new *controls, int num_controls,
2436 const char *prefix, void *data)
2437{
2438 int i;
2439
2440 for (i = 0; i < num_controls; i++) {
2441 const struct snd_kcontrol_new *control = &controls[i];
2442 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2443 control->name, prefix));
2444 if (err < 0) {
2445 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2446 control->name, err);
2447 return err;
2448 }
2449 }
2450
2451 return 0;
2452}
2453
2454/**
2455 * snd_soc_add_component_controls - Add an array of controls to a component.
2456 *
2457 * @component: Component to add controls to
2458 * @controls: Array of controls to add
2459 * @num_controls: Number of elements in the array
2460 *
2461 * Return: 0 for success, else error.
2462 */
2463int snd_soc_add_component_controls(struct snd_soc_component *component,
2464 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2465{
2466 struct snd_card *card = component->card->snd_card;
2467
2468 return snd_soc_add_controls(card, component->dev, controls,
2469 num_controls, component->name_prefix, component);
2470}
2471EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2472
2473/**
2474 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2475 * Convenience function to add a list of controls.
2476 *
2477 * @soc_card: SoC card to add controls to
2478 * @controls: array of controls to add
2479 * @num_controls: number of elements in the array
2480 *
2481 * Return 0 for success, else error.
2482 */
2483int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2484 const struct snd_kcontrol_new *controls, int num_controls)
2485{
2486 struct snd_card *card = soc_card->snd_card;
2487
2488 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2489 NULL, soc_card);
2490}
2491EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2492
2493/**
2494 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2495 * Convenience function to add a list of controls.
2496 *
2497 * @dai: DAI to add controls to
2498 * @controls: array of controls to add
2499 * @num_controls: number of elements in the array
2500 *
2501 * Return 0 for success, else error.
2502 */
2503int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2504 const struct snd_kcontrol_new *controls, int num_controls)
2505{
2506 struct snd_card *card = dai->component->card->snd_card;
2507
2508 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2509 NULL, dai);
2510}
2511EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2512
2513/**
2514 * snd_soc_register_card - Register a card with the ASoC core
2515 *
2516 * @card: Card to register
2517 *
2518 */
2519int snd_soc_register_card(struct snd_soc_card *card)
2520{
2521 if (!card->name || !card->dev)
2522 return -EINVAL;
2523
2524 dev_set_drvdata(card->dev, card);
2525
2526 INIT_LIST_HEAD(&card->widgets);
2527 INIT_LIST_HEAD(&card->paths);
2528 INIT_LIST_HEAD(&card->dapm_list);
2529 INIT_LIST_HEAD(&card->aux_comp_list);
2530 INIT_LIST_HEAD(&card->component_dev_list);
2531 INIT_LIST_HEAD(&card->list);
2532 INIT_LIST_HEAD(&card->rtd_list);
2533 INIT_LIST_HEAD(&card->dapm_dirty);
2534 INIT_LIST_HEAD(&card->dobj_list);
2535
2536 card->instantiated = 0;
2537 mutex_init(&card->mutex);
2538 mutex_init(&card->dapm_mutex);
2539 mutex_init(&card->pcm_mutex);
2540
2541 return snd_soc_bind_card(card);
2542}
2543EXPORT_SYMBOL_GPL(snd_soc_register_card);
2544
2545/**
2546 * snd_soc_unregister_card - Unregister a card with the ASoC core
2547 *
2548 * @card: Card to unregister
2549 *
2550 */
2551void snd_soc_unregister_card(struct snd_soc_card *card)
2552{
2553 mutex_lock(&client_mutex);
2554 snd_soc_unbind_card(card, true);
2555 mutex_unlock(&client_mutex);
2556 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2557}
2558EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2559
2560/*
2561 * Simplify DAI link configuration by removing ".-1" from device names
2562 * and sanitizing names.
2563 */
2564static char *fmt_single_name(struct device *dev, int *id)
2565{
2566 const char *devname = dev_name(dev);
2567 char *found, *name;
2568 unsigned int id1, id2;
2569
2570 if (devname == NULL)
2571 return NULL;
2572
2573 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2574 if (!name)
2575 return NULL;
2576
2577 /* are we a "%s.%d" name (platform and SPI components) */
2578 found = strstr(name, dev->driver->name);
2579 if (found) {
2580 /* get ID */
2581 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2582
2583 /* discard ID from name if ID == -1 */
2584 if (*id == -1)
2585 found[strlen(dev->driver->name)] = '\0';
2586 }
2587
2588 /* I2C component devices are named "bus-addr" */
2589 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2590
2591 /* create unique ID number from I2C addr and bus */
2592 *id = ((id1 & 0xffff) << 16) + id2;
2593
2594 devm_kfree(dev, name);
2595
2596 /* sanitize component name for DAI link creation */
2597 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2598 } else {
2599 *id = 0;
2600 }
2601
2602 return name;
2603}
2604
2605/*
2606 * Simplify DAI link naming for single devices with multiple DAIs by removing
2607 * any ".-1" and using the DAI name (instead of device name).
2608 */
2609static inline char *fmt_multiple_name(struct device *dev,
2610 struct snd_soc_dai_driver *dai_drv)
2611{
2612 if (dai_drv->name == NULL) {
2613 dev_err(dev,
2614 "ASoC: error - multiple DAI %s registered with no name\n",
2615 dev_name(dev));
2616 return NULL;
2617 }
2618
2619 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2620}
2621
2622void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2623{
2624 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2625 list_del(&dai->list);
2626}
2627EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2628
2629/**
2630 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2631 *
2632 * @component: The component the DAIs are registered for
2633 * @dai_drv: DAI driver to use for the DAI
2634 * @legacy_dai_naming: if %true, use legacy single-name format;
2635 * if %false, use multiple-name format;
2636 *
2637 * Topology can use this API to register DAIs when probing a component.
2638 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2639 * will be freed in the component cleanup.
2640 */
2641struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2642 struct snd_soc_dai_driver *dai_drv,
2643 bool legacy_dai_naming)
2644{
2645 struct device *dev = component->dev;
2646 struct snd_soc_dai *dai;
2647
2648 lockdep_assert_held(&client_mutex);
2649
2650 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2651 if (dai == NULL)
2652 return NULL;
2653
2654 /*
2655 * Back in the old days when we still had component-less DAIs,
2656 * instead of having a static name, component-less DAIs would
2657 * inherit the name of the parent device so it is possible to
2658 * register multiple instances of the DAI. We still need to keep
2659 * the same naming style even though those DAIs are not
2660 * component-less anymore.
2661 */
2662 if (legacy_dai_naming &&
2663 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2664 dai->name = fmt_single_name(dev, &dai->id);
2665 } else {
2666 dai->name = fmt_multiple_name(dev, dai_drv);
2667 if (dai_drv->id)
2668 dai->id = dai_drv->id;
2669 else
2670 dai->id = component->num_dai;
2671 }
2672 if (!dai->name)
2673 return NULL;
2674
2675 dai->component = component;
2676 dai->dev = dev;
2677 dai->driver = dai_drv;
2678
2679 /* see for_each_component_dais */
2680 list_add_tail(&dai->list, &component->dai_list);
2681 component->num_dai++;
2682
2683 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2684 return dai;
2685}
2686EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2687
2688/**
2689 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2690 *
2691 * @component: The component for which the DAIs should be unregistered
2692 */
2693static void snd_soc_unregister_dais(struct snd_soc_component *component)
2694{
2695 struct snd_soc_dai *dai, *_dai;
2696
2697 for_each_component_dais_safe(component, dai, _dai)
2698 snd_soc_unregister_dai(dai);
2699}
2700
2701/**
2702 * snd_soc_register_dais - Register a DAI with the ASoC core
2703 *
2704 * @component: The component the DAIs are registered for
2705 * @dai_drv: DAI driver to use for the DAIs
2706 * @count: Number of DAIs
2707 */
2708static int snd_soc_register_dais(struct snd_soc_component *component,
2709 struct snd_soc_dai_driver *dai_drv,
2710 size_t count)
2711{
2712 struct snd_soc_dai *dai;
2713 unsigned int i;
2714 int ret;
2715
2716 for (i = 0; i < count; i++) {
2717 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2718 component->driver->legacy_dai_naming);
2719 if (dai == NULL) {
2720 ret = -ENOMEM;
2721 goto err;
2722 }
2723 }
2724
2725 return 0;
2726
2727err:
2728 snd_soc_unregister_dais(component);
2729
2730 return ret;
2731}
2732
2733#define ENDIANNESS_MAP(name) \
2734 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2735static u64 endianness_format_map[] = {
2736 ENDIANNESS_MAP(S16_),
2737 ENDIANNESS_MAP(U16_),
2738 ENDIANNESS_MAP(S24_),
2739 ENDIANNESS_MAP(U24_),
2740 ENDIANNESS_MAP(S32_),
2741 ENDIANNESS_MAP(U32_),
2742 ENDIANNESS_MAP(S24_3),
2743 ENDIANNESS_MAP(U24_3),
2744 ENDIANNESS_MAP(S20_3),
2745 ENDIANNESS_MAP(U20_3),
2746 ENDIANNESS_MAP(S18_3),
2747 ENDIANNESS_MAP(U18_3),
2748 ENDIANNESS_MAP(FLOAT_),
2749 ENDIANNESS_MAP(FLOAT64_),
2750 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2751};
2752
2753/*
2754 * Fix up the DAI formats for endianness: codecs don't actually see
2755 * the endianness of the data but we're using the CPU format
2756 * definitions which do need to include endianness so we ensure that
2757 * codec DAIs always have both big and little endian variants set.
2758 */
2759static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2760{
2761 int i;
2762
2763 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2764 if (stream->formats & endianness_format_map[i])
2765 stream->formats |= endianness_format_map[i];
2766}
2767
2768static void snd_soc_try_rebind_card(void)
2769{
2770 struct snd_soc_card *card, *c;
2771
2772 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2773 if (!snd_soc_bind_card(card))
2774 list_del(&card->list);
2775}
2776
2777static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2778{
2779 struct snd_soc_card *card = component->card;
2780
2781 snd_soc_unregister_dais(component);
2782
2783 if (card)
2784 snd_soc_unbind_card(card, false);
2785
2786 list_del(&component->list);
2787}
2788
2789int snd_soc_component_initialize(struct snd_soc_component *component,
2790 const struct snd_soc_component_driver *driver,
2791 struct device *dev)
2792{
2793 INIT_LIST_HEAD(&component->dai_list);
2794 INIT_LIST_HEAD(&component->dobj_list);
2795 INIT_LIST_HEAD(&component->card_list);
2796 INIT_LIST_HEAD(&component->list);
2797 mutex_init(&component->io_mutex);
2798
2799 component->name = fmt_single_name(dev, &component->id);
2800 if (!component->name) {
2801 dev_err(dev, "ASoC: Failed to allocate name\n");
2802 return -ENOMEM;
2803 }
2804
2805 component->dev = dev;
2806 component->driver = driver;
2807
2808#ifdef CONFIG_DEBUG_FS
2809 if (!component->debugfs_prefix)
2810 component->debugfs_prefix = driver->debugfs_prefix;
2811#endif
2812
2813 return 0;
2814}
2815EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2816
2817int snd_soc_add_component(struct snd_soc_component *component,
2818 struct snd_soc_dai_driver *dai_drv,
2819 int num_dai)
2820{
2821 int ret;
2822 int i;
2823
2824 mutex_lock(&client_mutex);
2825
2826 if (component->driver->endianness) {
2827 for (i = 0; i < num_dai; i++) {
2828 convert_endianness_formats(&dai_drv[i].playback);
2829 convert_endianness_formats(&dai_drv[i].capture);
2830 }
2831 }
2832
2833 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2834 if (ret < 0) {
2835 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2836 ret);
2837 goto err_cleanup;
2838 }
2839
2840 if (!component->driver->write && !component->driver->read) {
2841 if (!component->regmap)
2842 component->regmap = dev_get_regmap(component->dev,
2843 NULL);
2844 if (component->regmap)
2845 snd_soc_component_setup_regmap(component);
2846 }
2847
2848 /* see for_each_component */
2849 list_add(&component->list, &component_list);
2850
2851err_cleanup:
2852 if (ret < 0)
2853 snd_soc_del_component_unlocked(component);
2854
2855 mutex_unlock(&client_mutex);
2856
2857 if (ret == 0)
2858 snd_soc_try_rebind_card();
2859
2860 return ret;
2861}
2862EXPORT_SYMBOL_GPL(snd_soc_add_component);
2863
2864int snd_soc_register_component(struct device *dev,
2865 const struct snd_soc_component_driver *component_driver,
2866 struct snd_soc_dai_driver *dai_drv,
2867 int num_dai)
2868{
2869 struct snd_soc_component *component;
2870 int ret;
2871
2872 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2873 if (!component)
2874 return -ENOMEM;
2875
2876 ret = snd_soc_component_initialize(component, component_driver, dev);
2877 if (ret < 0)
2878 return ret;
2879
2880 return snd_soc_add_component(component, dai_drv, num_dai);
2881}
2882EXPORT_SYMBOL_GPL(snd_soc_register_component);
2883
2884/**
2885 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2886 * from the ASoC core
2887 *
2888 * @dev: The device to unregister
2889 * @component_driver: The component driver to unregister
2890 */
2891void snd_soc_unregister_component_by_driver(struct device *dev,
2892 const struct snd_soc_component_driver *component_driver)
2893{
2894 struct snd_soc_component *component;
2895
2896 if (!component_driver)
2897 return;
2898
2899 mutex_lock(&client_mutex);
2900 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2901 if (!component)
2902 goto out;
2903
2904 snd_soc_del_component_unlocked(component);
2905
2906out:
2907 mutex_unlock(&client_mutex);
2908}
2909EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2910
2911/**
2912 * snd_soc_unregister_component - Unregister all related component
2913 * from the ASoC core
2914 *
2915 * @dev: The device to unregister
2916 */
2917void snd_soc_unregister_component(struct device *dev)
2918{
2919 mutex_lock(&client_mutex);
2920 while (1) {
2921 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2922
2923 if (!component)
2924 break;
2925
2926 snd_soc_del_component_unlocked(component);
2927 }
2928 mutex_unlock(&client_mutex);
2929}
2930EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2931
2932/* Retrieve a card's name from device tree */
2933int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2934 const char *propname)
2935{
2936 struct device_node *np;
2937 int ret;
2938
2939 if (!card->dev) {
2940 pr_err("card->dev is not set before calling %s\n", __func__);
2941 return -EINVAL;
2942 }
2943
2944 np = card->dev->of_node;
2945
2946 ret = of_property_read_string_index(np, propname, 0, &card->name);
2947 /*
2948 * EINVAL means the property does not exist. This is fine providing
2949 * card->name was previously set, which is checked later in
2950 * snd_soc_register_card.
2951 */
2952 if (ret < 0 && ret != -EINVAL) {
2953 dev_err(card->dev,
2954 "ASoC: Property '%s' could not be read: %d\n",
2955 propname, ret);
2956 return ret;
2957 }
2958
2959 return 0;
2960}
2961EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2962
2963static const struct snd_soc_dapm_widget simple_widgets[] = {
2964 SND_SOC_DAPM_MIC("Microphone", NULL),
2965 SND_SOC_DAPM_LINE("Line", NULL),
2966 SND_SOC_DAPM_HP("Headphone", NULL),
2967 SND_SOC_DAPM_SPK("Speaker", NULL),
2968};
2969
2970int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2971 const char *propname)
2972{
2973 struct device_node *np = card->dev->of_node;
2974 struct snd_soc_dapm_widget *widgets;
2975 const char *template, *wname;
2976 int i, j, num_widgets;
2977
2978 num_widgets = of_property_count_strings(np, propname);
2979 if (num_widgets < 0) {
2980 dev_err(card->dev,
2981 "ASoC: Property '%s' does not exist\n", propname);
2982 return -EINVAL;
2983 }
2984 if (!num_widgets) {
2985 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2986 propname);
2987 return -EINVAL;
2988 }
2989 if (num_widgets & 1) {
2990 dev_err(card->dev,
2991 "ASoC: Property '%s' length is not even\n", propname);
2992 return -EINVAL;
2993 }
2994
2995 num_widgets /= 2;
2996
2997 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2998 GFP_KERNEL);
2999 if (!widgets) {
3000 dev_err(card->dev,
3001 "ASoC: Could not allocate memory for widgets\n");
3002 return -ENOMEM;
3003 }
3004
3005 for (i = 0; i < num_widgets; i++) {
3006 int ret = of_property_read_string_index(np, propname,
3007 2 * i, &template);
3008 if (ret) {
3009 dev_err(card->dev,
3010 "ASoC: Property '%s' index %d read error:%d\n",
3011 propname, 2 * i, ret);
3012 return -EINVAL;
3013 }
3014
3015 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3016 if (!strncmp(template, simple_widgets[j].name,
3017 strlen(simple_widgets[j].name))) {
3018 widgets[i] = simple_widgets[j];
3019 break;
3020 }
3021 }
3022
3023 if (j >= ARRAY_SIZE(simple_widgets)) {
3024 dev_err(card->dev,
3025 "ASoC: DAPM widget '%s' is not supported\n",
3026 template);
3027 return -EINVAL;
3028 }
3029
3030 ret = of_property_read_string_index(np, propname,
3031 (2 * i) + 1,
3032 &wname);
3033 if (ret) {
3034 dev_err(card->dev,
3035 "ASoC: Property '%s' index %d read error:%d\n",
3036 propname, (2 * i) + 1, ret);
3037 return -EINVAL;
3038 }
3039
3040 widgets[i].name = wname;
3041 }
3042
3043 card->of_dapm_widgets = widgets;
3044 card->num_of_dapm_widgets = num_widgets;
3045
3046 return 0;
3047}
3048EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3049
3050int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3051{
3052 const unsigned int nb_controls_max = 16;
3053 const char **strings, *control_name;
3054 struct snd_kcontrol_new *controls;
3055 struct device *dev = card->dev;
3056 unsigned int i, nb_controls;
3057 int ret;
3058
3059 if (!of_property_read_bool(dev->of_node, prop))
3060 return 0;
3061
3062 strings = devm_kcalloc(dev, nb_controls_max,
3063 sizeof(*strings), GFP_KERNEL);
3064 if (!strings)
3065 return -ENOMEM;
3066
3067 ret = of_property_read_string_array(dev->of_node, prop,
3068 strings, nb_controls_max);
3069 if (ret < 0)
3070 return ret;
3071
3072 nb_controls = (unsigned int)ret;
3073
3074 controls = devm_kcalloc(dev, nb_controls,
3075 sizeof(*controls), GFP_KERNEL);
3076 if (!controls)
3077 return -ENOMEM;
3078
3079 for (i = 0; i < nb_controls; i++) {
3080 control_name = devm_kasprintf(dev, GFP_KERNEL,
3081 "%s Switch", strings[i]);
3082 if (!control_name)
3083 return -ENOMEM;
3084
3085 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3086 controls[i].name = control_name;
3087 controls[i].info = snd_soc_dapm_info_pin_switch;
3088 controls[i].get = snd_soc_dapm_get_pin_switch;
3089 controls[i].put = snd_soc_dapm_put_pin_switch;
3090 controls[i].private_value = (unsigned long)strings[i];
3091 }
3092
3093 card->controls = controls;
3094 card->num_controls = nb_controls;
3095
3096 return 0;
3097}
3098EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3099
3100int snd_soc_of_get_slot_mask(struct device_node *np,
3101 const char *prop_name,
3102 unsigned int *mask)
3103{
3104 u32 val;
3105 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3106 int i;
3107
3108 if (!of_slot_mask)
3109 return 0;
3110 val /= sizeof(u32);
3111 for (i = 0; i < val; i++)
3112 if (be32_to_cpup(&of_slot_mask[i]))
3113 *mask |= (1 << i);
3114
3115 return val;
3116}
3117EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3118
3119int snd_soc_of_parse_tdm_slot(struct device_node *np,
3120 unsigned int *tx_mask,
3121 unsigned int *rx_mask,
3122 unsigned int *slots,
3123 unsigned int *slot_width)
3124{
3125 u32 val;
3126 int ret;
3127
3128 if (tx_mask)
3129 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3130 if (rx_mask)
3131 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3132
3133 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3134 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3135 if (ret)
3136 return ret;
3137
3138 if (slots)
3139 *slots = val;
3140 }
3141
3142 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3143 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3144 if (ret)
3145 return ret;
3146
3147 if (slot_width)
3148 *slot_width = val;
3149 }
3150
3151 return 0;
3152}
3153EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3154
3155void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3156 struct snd_soc_dai_link_component *cpus)
3157{
3158 platforms->of_node = cpus->of_node;
3159 platforms->dai_args = cpus->dai_args;
3160}
3161EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3162
3163void snd_soc_of_parse_node_prefix(struct device_node *np,
3164 struct snd_soc_codec_conf *codec_conf,
3165 struct device_node *of_node,
3166 const char *propname)
3167{
3168 const char *str;
3169 int ret;
3170
3171 ret = of_property_read_string(np, propname, &str);
3172 if (ret < 0) {
3173 /* no prefix is not error */
3174 return;
3175 }
3176
3177 codec_conf->dlc.of_node = of_node;
3178 codec_conf->name_prefix = str;
3179}
3180EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3181
3182int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3183 const char *propname)
3184{
3185 struct device_node *np = card->dev->of_node;
3186 int num_routes;
3187 struct snd_soc_dapm_route *routes;
3188 int i;
3189
3190 num_routes = of_property_count_strings(np, propname);
3191 if (num_routes < 0 || num_routes & 1) {
3192 dev_err(card->dev,
3193 "ASoC: Property '%s' does not exist or its length is not even\n",
3194 propname);
3195 return -EINVAL;
3196 }
3197 num_routes /= 2;
3198
3199 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3200 GFP_KERNEL);
3201 if (!routes) {
3202 dev_err(card->dev,
3203 "ASoC: Could not allocate DAPM route table\n");
3204 return -ENOMEM;
3205 }
3206
3207 for (i = 0; i < num_routes; i++) {
3208 int ret = of_property_read_string_index(np, propname,
3209 2 * i, &routes[i].sink);
3210 if (ret) {
3211 dev_err(card->dev,
3212 "ASoC: Property '%s' index %d could not be read: %d\n",
3213 propname, 2 * i, ret);
3214 return -EINVAL;
3215 }
3216 ret = of_property_read_string_index(np, propname,
3217 (2 * i) + 1, &routes[i].source);
3218 if (ret) {
3219 dev_err(card->dev,
3220 "ASoC: Property '%s' index %d could not be read: %d\n",
3221 propname, (2 * i) + 1, ret);
3222 return -EINVAL;
3223 }
3224 }
3225
3226 card->num_of_dapm_routes = num_routes;
3227 card->of_dapm_routes = routes;
3228
3229 return 0;
3230}
3231EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3232
3233int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3234{
3235 struct device_node *node = card->dev->of_node;
3236 struct snd_soc_aux_dev *aux;
3237 int num, i;
3238
3239 num = of_count_phandle_with_args(node, propname, NULL);
3240 if (num == -ENOENT) {
3241 return 0;
3242 } else if (num < 0) {
3243 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3244 propname, num);
3245 return num;
3246 }
3247
3248 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3249 if (!aux)
3250 return -ENOMEM;
3251 card->aux_dev = aux;
3252 card->num_aux_devs = num;
3253
3254 for_each_card_pre_auxs(card, i, aux) {
3255 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3256 if (!aux->dlc.of_node)
3257 return -EINVAL;
3258 }
3259
3260 return 0;
3261}
3262EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3263
3264unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3265{
3266 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3267
3268 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3269 case SND_SOC_DAIFMT_CBP_CFP:
3270 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3271 break;
3272 case SND_SOC_DAIFMT_CBP_CFC:
3273 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3274 break;
3275 case SND_SOC_DAIFMT_CBC_CFP:
3276 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3277 break;
3278 case SND_SOC_DAIFMT_CBC_CFC:
3279 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3280 break;
3281 }
3282
3283 return inv_dai_fmt;
3284}
3285EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3286
3287unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3288{
3289 /*
3290 * bit_frame is return value from
3291 * snd_soc_daifmt_parse_clock_provider_raw()
3292 */
3293
3294 /* Codec base */
3295 switch (bit_frame) {
3296 case 0x11:
3297 return SND_SOC_DAIFMT_CBP_CFP;
3298 case 0x10:
3299 return SND_SOC_DAIFMT_CBP_CFC;
3300 case 0x01:
3301 return SND_SOC_DAIFMT_CBC_CFP;
3302 default:
3303 return SND_SOC_DAIFMT_CBC_CFC;
3304 }
3305
3306 return 0;
3307}
3308EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3309
3310unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3311 const char *prefix)
3312{
3313 int ret;
3314 char prop[128];
3315 unsigned int format = 0;
3316 int bit, frame;
3317 const char *str;
3318 struct {
3319 char *name;
3320 unsigned int val;
3321 } of_fmt_table[] = {
3322 { "i2s", SND_SOC_DAIFMT_I2S },
3323 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3324 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3325 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3326 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3327 { "ac97", SND_SOC_DAIFMT_AC97 },
3328 { "pdm", SND_SOC_DAIFMT_PDM},
3329 { "msb", SND_SOC_DAIFMT_MSB },
3330 { "lsb", SND_SOC_DAIFMT_LSB },
3331 };
3332
3333 if (!prefix)
3334 prefix = "";
3335
3336 /*
3337 * check "dai-format = xxx"
3338 * or "[prefix]format = xxx"
3339 * SND_SOC_DAIFMT_FORMAT_MASK area
3340 */
3341 ret = of_property_read_string(np, "dai-format", &str);
3342 if (ret < 0) {
3343 snprintf(prop, sizeof(prop), "%sformat", prefix);
3344 ret = of_property_read_string(np, prop, &str);
3345 }
3346 if (ret == 0) {
3347 int i;
3348
3349 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3350 if (strcmp(str, of_fmt_table[i].name) == 0) {
3351 format |= of_fmt_table[i].val;
3352 break;
3353 }
3354 }
3355 }
3356
3357 /*
3358 * check "[prefix]continuous-clock"
3359 * SND_SOC_DAIFMT_CLOCK_MASK area
3360 */
3361 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3362 if (of_property_read_bool(np, prop))
3363 format |= SND_SOC_DAIFMT_CONT;
3364 else
3365 format |= SND_SOC_DAIFMT_GATED;
3366
3367 /*
3368 * check "[prefix]bitclock-inversion"
3369 * check "[prefix]frame-inversion"
3370 * SND_SOC_DAIFMT_INV_MASK area
3371 */
3372 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3373 bit = !!of_get_property(np, prop, NULL);
3374
3375 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3376 frame = !!of_get_property(np, prop, NULL);
3377
3378 switch ((bit << 4) + frame) {
3379 case 0x11:
3380 format |= SND_SOC_DAIFMT_IB_IF;
3381 break;
3382 case 0x10:
3383 format |= SND_SOC_DAIFMT_IB_NF;
3384 break;
3385 case 0x01:
3386 format |= SND_SOC_DAIFMT_NB_IF;
3387 break;
3388 default:
3389 /* SND_SOC_DAIFMT_NB_NF is default */
3390 break;
3391 }
3392
3393 return format;
3394}
3395EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3396
3397unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3398 const char *prefix,
3399 struct device_node **bitclkmaster,
3400 struct device_node **framemaster)
3401{
3402 char prop[128];
3403 unsigned int bit, frame;
3404
3405 if (!prefix)
3406 prefix = "";
3407
3408 /*
3409 * check "[prefix]bitclock-master"
3410 * check "[prefix]frame-master"
3411 */
3412 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3413 bit = !!of_get_property(np, prop, NULL);
3414 if (bit && bitclkmaster)
3415 *bitclkmaster = of_parse_phandle(np, prop, 0);
3416
3417 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3418 frame = !!of_get_property(np, prop, NULL);
3419 if (frame && framemaster)
3420 *framemaster = of_parse_phandle(np, prop, 0);
3421
3422 /*
3423 * return bitmap.
3424 * It will be parameter of
3425 * snd_soc_daifmt_clock_provider_from_bitmap()
3426 */
3427 return (bit << 4) + frame;
3428}
3429EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3430
3431int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream)
3432{
3433 /*
3434 * [Normal]
3435 *
3436 * Playback
3437 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3438 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3439 *
3440 * Capture
3441 * CPU : SNDRV_PCM_STREAM_CAPTURE
3442 * Codec: SNDRV_PCM_STREAM_CAPTURE
3443 */
3444 if (!dai_link->c2c_params)
3445 return stream;
3446
3447 /*
3448 * [Codec2Codec]
3449 *
3450 * Playback
3451 * CPU : SNDRV_PCM_STREAM_CAPTURE
3452 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3453 *
3454 * Capture
3455 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3456 * Codec: SNDRV_PCM_STREAM_CAPTURE
3457 */
3458 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3459 return SNDRV_PCM_STREAM_PLAYBACK;
3460
3461 return SNDRV_PCM_STREAM_CAPTURE;
3462}
3463EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3464
3465int snd_soc_get_dai_id(struct device_node *ep)
3466{
3467 struct snd_soc_component *component;
3468 struct snd_soc_dai_link_component dlc = {
3469 .of_node = of_graph_get_port_parent(ep),
3470 };
3471 int ret;
3472
3473
3474 /*
3475 * For example HDMI case, HDMI has video/sound port,
3476 * but ALSA SoC needs sound port number only.
3477 * Thus counting HDMI DT port/endpoint doesn't work.
3478 * Then, it should have .of_xlate_dai_id
3479 */
3480 ret = -ENOTSUPP;
3481 mutex_lock(&client_mutex);
3482 component = soc_find_component(&dlc);
3483 if (component)
3484 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3485 mutex_unlock(&client_mutex);
3486
3487 of_node_put(dlc.of_node);
3488
3489 return ret;
3490}
3491EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3492
3493int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3494{
3495 struct snd_soc_component *pos;
3496 int ret = -EPROBE_DEFER;
3497
3498 mutex_lock(&client_mutex);
3499 for_each_component(pos) {
3500 struct device_node *component_of_node = soc_component_to_node(pos);
3501
3502 if (component_of_node != args->np || !pos->num_dai)
3503 continue;
3504
3505 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3506 if (ret == -ENOTSUPP) {
3507 struct snd_soc_dai *dai;
3508 int id = -1;
3509
3510 switch (args->args_count) {
3511 case 0:
3512 id = 0; /* same as dai_drv[0] */
3513 break;
3514 case 1:
3515 id = args->args[0];
3516 break;
3517 default:
3518 /* not supported */
3519 break;
3520 }
3521
3522 if (id < 0 || id >= pos->num_dai) {
3523 ret = -EINVAL;
3524 continue;
3525 }
3526
3527 ret = 0;
3528
3529 /* find target DAI */
3530 for_each_component_dais(pos, dai) {
3531 if (id == 0)
3532 break;
3533 id--;
3534 }
3535
3536 dlc->dai_name = snd_soc_dai_name_get(dai);
3537 } else if (ret) {
3538 /*
3539 * if another error than ENOTSUPP is returned go on and
3540 * check if another component is provided with the same
3541 * node. This may happen if a device provides several
3542 * components
3543 */
3544 continue;
3545 }
3546
3547 break;
3548 }
3549
3550 if (ret == 0)
3551 dlc->of_node = args->np;
3552
3553 mutex_unlock(&client_mutex);
3554 return ret;
3555}
3556EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3557
3558int snd_soc_of_get_dlc(struct device_node *of_node,
3559 struct of_phandle_args *args,
3560 struct snd_soc_dai_link_component *dlc,
3561 int index)
3562{
3563 struct of_phandle_args __args;
3564 int ret;
3565
3566 if (!args)
3567 args = &__args;
3568
3569 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3570 "#sound-dai-cells", index, args);
3571 if (ret)
3572 return ret;
3573
3574 return snd_soc_get_dlc(args, dlc);
3575}
3576EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3577
3578int snd_soc_get_dai_name(const struct of_phandle_args *args,
3579 const char **dai_name)
3580{
3581 struct snd_soc_dai_link_component dlc;
3582 int ret = snd_soc_get_dlc(args, &dlc);
3583
3584 if (ret == 0)
3585 *dai_name = dlc.dai_name;
3586
3587 return ret;
3588}
3589EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3590
3591int snd_soc_of_get_dai_name(struct device_node *of_node,
3592 const char **dai_name, int index)
3593{
3594 struct snd_soc_dai_link_component dlc;
3595 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3596
3597 if (ret == 0)
3598 *dai_name = dlc.dai_name;
3599
3600 return ret;
3601}
3602EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3603
3604struct snd_soc_dai *snd_soc_get_dai_via_args(const struct of_phandle_args *dai_args)
3605{
3606 struct snd_soc_dai *dai;
3607 struct snd_soc_component *component;
3608
3609 mutex_lock(&client_mutex);
3610 for_each_component(component) {
3611 for_each_component_dais(component, dai)
3612 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3613 goto found;
3614 }
3615 dai = NULL;
3616found:
3617 mutex_unlock(&client_mutex);
3618 return dai;
3619}
3620EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3621
3622static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3623{
3624 if (component->of_node) {
3625 of_node_put(component->of_node);
3626 component->of_node = NULL;
3627 }
3628}
3629
3630static int __snd_soc_of_get_dai_link_component_alloc(
3631 struct device *dev, struct device_node *of_node,
3632 struct snd_soc_dai_link_component **ret_component,
3633 int *ret_num)
3634{
3635 struct snd_soc_dai_link_component *component;
3636 int num;
3637
3638 /* Count the number of CPUs/CODECs */
3639 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3640 if (num <= 0) {
3641 if (num == -ENOENT)
3642 dev_err(dev, "No 'sound-dai' property\n");
3643 else
3644 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3645 return num;
3646 }
3647 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3648 if (!component)
3649 return -ENOMEM;
3650
3651 *ret_component = component;
3652 *ret_num = num;
3653
3654 return 0;
3655}
3656
3657/*
3658 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3659 * @dai_link: DAI link
3660 *
3661 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3662 */
3663void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3664{
3665 struct snd_soc_dai_link_component *component;
3666 int index;
3667
3668 for_each_link_codecs(dai_link, index, component)
3669 __snd_soc_of_put_component(component);
3670}
3671EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3672
3673/*
3674 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3675 * @dev: Card device
3676 * @of_node: Device node
3677 * @dai_link: DAI link
3678 *
3679 * Builds an array of CODEC DAI components from the DAI link property
3680 * 'sound-dai'.
3681 * The array is set in the DAI link and the number of DAIs is set accordingly.
3682 * The device nodes in the array (of_node) must be dereferenced by calling
3683 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3684 *
3685 * Returns 0 for success
3686 */
3687int snd_soc_of_get_dai_link_codecs(struct device *dev,
3688 struct device_node *of_node,
3689 struct snd_soc_dai_link *dai_link)
3690{
3691 struct snd_soc_dai_link_component *component;
3692 int index, ret;
3693
3694 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3695 &dai_link->codecs, &dai_link->num_codecs);
3696 if (ret < 0)
3697 return ret;
3698
3699 /* Parse the list */
3700 for_each_link_codecs(dai_link, index, component) {
3701 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3702 if (ret)
3703 goto err;
3704 }
3705 return 0;
3706err:
3707 snd_soc_of_put_dai_link_codecs(dai_link);
3708 dai_link->codecs = NULL;
3709 dai_link->num_codecs = 0;
3710 return ret;
3711}
3712EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3713
3714/*
3715 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3716 * @dai_link: DAI link
3717 *
3718 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3719 */
3720void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3721{
3722 struct snd_soc_dai_link_component *component;
3723 int index;
3724
3725 for_each_link_cpus(dai_link, index, component)
3726 __snd_soc_of_put_component(component);
3727}
3728EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3729
3730/*
3731 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3732 * @dev: Card device
3733 * @of_node: Device node
3734 * @dai_link: DAI link
3735 *
3736 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3737 * instead.
3738 *
3739 * Returns 0 for success
3740 */
3741int snd_soc_of_get_dai_link_cpus(struct device *dev,
3742 struct device_node *of_node,
3743 struct snd_soc_dai_link *dai_link)
3744{
3745 struct snd_soc_dai_link_component *component;
3746 int index, ret;
3747
3748 /* Count the number of CPUs */
3749 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3750 &dai_link->cpus, &dai_link->num_cpus);
3751 if (ret < 0)
3752 return ret;
3753
3754 /* Parse the list */
3755 for_each_link_cpus(dai_link, index, component) {
3756 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3757 if (ret)
3758 goto err;
3759 }
3760 return 0;
3761err:
3762 snd_soc_of_put_dai_link_cpus(dai_link);
3763 dai_link->cpus = NULL;
3764 dai_link->num_cpus = 0;
3765 return ret;
3766}
3767EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3768
3769static int __init snd_soc_init(void)
3770{
3771 int ret;
3772
3773 snd_soc_debugfs_init();
3774 ret = snd_soc_util_init();
3775 if (ret)
3776 goto err_util_init;
3777
3778 ret = platform_driver_register(&soc_driver);
3779 if (ret)
3780 goto err_register;
3781 return 0;
3782
3783err_register:
3784 snd_soc_util_exit();
3785err_util_init:
3786 snd_soc_debugfs_exit();
3787 return ret;
3788}
3789module_init(snd_soc_init);
3790
3791static void __exit snd_soc_exit(void)
3792{
3793 snd_soc_util_exit();
3794 snd_soc_debugfs_exit();
3795
3796 platform_driver_unregister(&soc_driver);
3797}
3798module_exit(snd_soc_exit);
3799
3800/* Module information */
3801MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3802MODULE_DESCRIPTION("ALSA SoC Core");
3803MODULE_LICENSE("GPL");
3804MODULE_ALIAS("platform:soc-audio");